[@Lonewolf685]: No dice. Not letting them through regardless of circumstance.
Though technically homunculi are Servants too, as we've seen with Fran. But you get what I mean. >:I
Oh wait, uh... Wrong topic. But still, how would you summon them to the area in the first place? >3>

[@KoL]: Diarmuid is, as expected, okay. Seyrun is her current state is also okay. But the second Master you put up there...
That's a problem.
Honestly, that Royal Rose Garden thing is waaaay too powerful for what it needs. I'd compare it to a Reality Marble without actually BEING one because it not only strengthens the user, but says fuck all to any sort of healing factor. The only thing missing here is pulling those around the user into their own world, but this circumvents that by bringing the world to them. There's also a ton of utility with her magical shenanigans, coupled with offense and defense, and all at the age of 15 to parents who didn't even want her.
Which, quite honestly, is still a problem. To say nothing of the fact that the backstory given for the character makes it really strange to know the magic in the first place (after all, she inherited magic she can't use, but somehow learned some for her own special fringe case). Furthermore, if she's being hunted down by both the Mage's Association and the Church and escaped (which is in and of itself a miracle), I don't see any logical reason for her to respect Zelretch's summon in the first place.

So yeah. Scattered problems left and right on that front. Sorry, can't accept that one.