If he bothered with considering things, he probably wouldn't have gotten his frame in the first place, so he's gonna need some exquisitely poignant lessons to learn that particular communication skill xD

[hider=Eva and Kawal, buddies for life! However long that may be.][youtube]https://www.youtube.com/watch?v=QpMEXYGG3Dg[/youtube][/hider]

Also, Foster, as your Senpai, a Bogey in aviator slang is an Unidentified Object [i]and[/i] potentially hostile aircraft. Admittedly frames aren't airborne, but I'd assume they adopted Aviator lingo, as well as a similar cult of personality owing to them seeing themselves as being on the cutting edge, much as Pilots did in the early days of aviation (and how many still do)

Plus[i] Troy[/i]. So I'd say a perfectly suitable phrasing. xD

Edit: Youtube frzlgrfhng...