(I'm still working on this. But if you want something specific tell me now.)
Katherine Anne PrydeNow, he didn't really attend school with Kitty, but he's known her for quite some time, especially since they're relatively the same age. But, Kitty has the know how and the confidence to run Xavier's Institute, and a quality he can't quite put his finger on that makes her the perfect candidate. If anyone saw it, it was probably the Professor. But, regardless, Mars follows Kitty wherever she wants to go; he's got her back, just like she has his, and apparently everyone involved and more. Whatever she needs, especially money wise, he's got it covered, just as long as he gets to be a part of the action. Action, as in being involved in reestablishing Xavier's Institute as the safest haven that mutantkind can find. If there's anyone he'd be more afraid of failing, it's probably Kitty. He has no say as to where his money goes and trusts Kitty's decisions and leadership to the fullest.
They're good friends and he loves her like a sister, but Marlowe is stubborn and Kitty knows that. No matter what problems he has, he always diminishes it and hides it behind issues he feels need more attention. But, he's assured her plenty that nothing will stop him from giving the students hope and something to hold on to, as well as a good education to boot. He feels he can solve his problems on his own, especially since he'd feel terrible if he dragged anyone else into them, and hopefully she understands and respects his decision.
Armonia TorresMarlowe hadn't the pleasure of attending the Institute when he was younger (caring for your impoverished mother kind of forces you away from proper education), but when he started helping out and teaching when Xavier was still alive, he did have the pleasure of working with Art on a few occasions and teaching her some. From the age he met her to about 18, she'd had this weird shift in personalities, but he'd not questioned it. It was probably for the better. However, he didn't really get to know her until he found her performing out in the streets and the later than night working the graveyard shift for a diner. That's where they officially met and become relatively close for two people with radically different lives. He'd, on occasion, head down to where she'd work, ask her if she was doing alright, and occasionally she'd accept a few persistent invitations for dinner with him and his husband. Though, that kind of stopped when shit hit the fan and she disappeared afterwards; he'd asked her once and got a meaningless remark and immediately dropped it afterwards. Mars always respected her personal space.
Though he'd consider them pretty close friends, he has yet to tell her of the incident between him and his late husband. In fact, he'd rather not anyone but he and Kitty know. Regardless, Art is probably one of the only teacher's he's comfortable completely letting go with, and has on occasion made more than enough of a ruckus dancing and singing with her until his throat was raw. Not to mention he'd been drinking that day, but no one needed to know that tidbit. He keeps asking her to tattoo him (mainly when he's drunk) but always chickens out at the last second. One of these days he's going to be strapped to a chair and given the largest, most intrusive tattoo of his life and he'd not regret because he probably deserves it for literally playing chicken so much over the past few months.
Daisy VaughnDaisy's been there since he started teaching, so of course he remembers her face. She was a very hard working student and he often helped her out with some of her college work whenever he could, but he was only really proficient in mathematics and science based math. They were on a student-teacher basis and, despite having grown since then and been separated due to what had occurred, he fears that they probably still are. Of course, he often dips in to help with her combat class to spar and instruct students on CQC type combat. Outside of work, currently, he talks with her on occasion, possibly to reminisce. He particular likes having coffee with her and simply chatting the morning away.
Steve IrvineThere's not a lot he currently knows about Steve, aside from maybe having met him once or twice before he left. Through recent interactions, though, he and Steve get along pretty well, but are strictly just colleagues at the moment. He enjoys his passion and occasionally chatting during breaks or days off, but other than that, Marlowe and Steve don't have much to go off of, though that's only due to the little amount of time that they've known each other and the recent issues that Mars is currently going through.
Marlowe FaradayMarlowe likes himself just fine. Although there are moments that he certainly wishes he could have a different, more temporal based power, like the one he's currently going through, but Mars is usually very sure of himself and confident in the things that he does. Most of all, he knows who he is and that only he has the power to guide his life—that took awhile to realize, but he's become a much happier person for it. He doesn't let things get to his head and prefers not to judge someone until they've proven themselves, and even then he usually keeps his opinions to himself. If there's anyone who can understand his rigorous exercise routine and need to wake up so early, it's her. It helps that she's chatty individual who packs more of a punch than the coffee he drinks.
Freddie DiAngeloAmong some of the other teachers, Freddie has been one of the few he's taught prior to the destruction of the X-Mansion and the division of most of the X-Men. He's more than once stepped in to help calm Freddie down and on more than once accompanied him out on the basketball field or in the sparring ring in an attempt to help him blow off steam. Through that he's gotten the pleasure of getting to know Freddie and vice versa, though they've not quite known each other outside of the school and when it went up in flames, most of the people simply wandered off. It's been awhile since he's seen Freddie, but when Kitty re-opened the school, he had the pleasure of getting caught up over a few chats with the other teachers.
He likes Freddie and believes him to be a very strong individual, both on the outside and character wise. He respects and trusts him and his abilities, though they aren't the closest friends. He's very capable in Marlowe's mind and, though he has a temper, he's definitely certain of Freddie's resolve. And if Freddie slips up, Marlowe's among the few who give him a bit of leeway for it; he knows sometimes it's hard to just keep it all in and it's better to let it out and direct it safely, than do something one would potentially regret.

Luna MarionetteA bit of a wildcard, but who's not a wildcard nowadays? Guess that's what's chic and hipster now. But, anything Marlowe says that's cheeky is all in jest, especially since she's one of his students. A very impulsive and chatty lady, but that's natural for gal with powers like hers, though she's often caught her staring at a few of the male teachers—he couldn't blame her, to be honest, 'cause some of 'em aren't half bad. However, a student-teacher relationship that gets out of hand, can spell more than just a few broken hearts, so he's had to drag her into his classroom after the period ended to make sure she knows what people are open to a relationship like that and that teachers are kind of off a no fly zone. That's not the whole make up of their relationship; Marlowe serves as a good teacher and confidant for his students and Luna isn't an exception to that rule. He likes to do what he can for her because, even if he doesn't understand what it's like to have volatile powers, he understands what it's like to be under the pressure of prejudice or put in a different category aside from normal. For that to happen in a school for people who are way off that spectrum, it's gotta be a dead end where all hopes and dreams go to die. No one deserves that kind of treatment and no one deserves to have to keep people at a distance just to protect them from yourself.
Duncan SpencerNot a necessarily social individual, but that's okay. Sometimes students think it's a little weird to get buddy-buddy with their teachers and he gives those students space, mainly because they tend to be Debbie Downers, anyways. Not that that's a bad thing, but when people don't want to be dealt with, then it'd be rude to push them out of their comfort zone. Duncan's a special case, though, in that his powers are often a nexus for Marlowe's curiosity. Due to the fact that he absorbs kinetic energy he may or may not have ran a few random, possibly harmful tests to find the boy's threshold.
So far, he's gotten to about 100 Newtons of force and he still has yet to budge.
River HunniganThere's not much Marlowe knows about River, so he's reserved any opinions he has about him. But, he can't help but feel a bit of a 'bad boy' vibe from him, though he'll wait for the kid to come around before he confirms that theory. Of course, he does seem to be avoiding him purposefully, not that Marlowe minds, but it seems just a tad bit suspicious. If there's anyone that's a stickler for the rules, Marlowe is probably close to the bottom of that list. But, everyone needs help one at some point in their lives and Marlowe knows he's among the more amiable teachers (though he competes with Art for who the nicest, most helpful teacher is) and he knows exactly the point where he can pounce on his prey. For now, he's content with being aloof like River seems to be doing.
Naka VejayHas yet to see her, so he has no current opinion of her.
Alicia TaylorCool kid, weird power. She seems to have a bit of a difficulty with physics, but Marlowe's life is dedicated to helping the students anyways, so it's never an inconvenience if she needs to stay after class. He makes sure he doesn't leave the institute until everyone's sure they don't need to talk to him (and even then, he often spends the night because it can be a bit hard at home). Marlowe doesn't have too much of a formal opinion of her, other than that she's probably one of the calmer, less troubled kids that attend the mutant exclusive school. But, Marlowe always keeps his door open for anyone to wander in and pretty much ask anything, maybe chat a little and get to know their teachers, etc.
Oona FredrickAmong the more unusual powers that some students are gifted with, but it's unique to her and useful in its own way. She seems like a rather happy individual, albeit a bit bashful and doesn't often talk to Marlowe. He's approached her a few times and she's not really said more than necessary, so Marlowe leaves it at that. He doesn't often like to press his students, but can be a bit shady when it comes to coaxing 'em out of their shells—none of which is too humiliating, should they not be ready, and none of which he isn't going to hold himself accountable for. He takes full responsibility if he makes any of his students feel uncomfortable and out of place because he overstepped a boundary.
Alucard De VinciNosferatu, he likes to call Alucard. Unfortunately, as a teacher, he's been given as much info as possible on his students and their powers. Many times he's dragged the kid back to make sure he doesn't intentionally (or even unintentionally) drain ANY of the students or faculty in the school, or outside, or anywhere really. He doesn't take charge in that district, as there's probably someone who already attempts to keep him supplied with his type of sustenance. Out of all of the kids, he's very wary of Alucard when he's around any of the other students and often keeps an eye on him specifically, not out of distrust, but purely out of precaution. There are plenty of potential threats already within the building, but Mars likes to focus on those he feels have near total control over their decisions, Alucard being one of them.
Harley CoemanThis kid—greatest kid ever. No, but, Harley works exceptionally hard at whatever he focuses his mind on, and though Mars understands and sees the lack of confidence in his eyes, he knows there's enough drive deep down to keep him going in the right direction. Marlowe likes to be one of the guiding hands in that, along with some other teachers, in order to make sure he's making progress in the right direction. He does that to a lot of the kids, but more specifically, he likes to take more responsibility for the 'special case' children that attend the Institute, though he understands that a lot of the other teachers feel the same way. Although, Harley one of the less social of the student body, Mars does his best to at least talk to the kid once a day, in order to see how well he's doing and if he's progressing any.

Daniel GreenJade GreenAurora ClaudwellAdrien TimoshenkoElena ElwynFlavie LefèvreMorena Silicus