Admin Mawile: (*´ω｀*)) The answer is, at first, they do not take it well. 

Shuu:

-As long as you don’t try to interfere with his sleep, he doesn’t care too much what you’re there for. You’ll only become a problem if you make him do things, and until then, he’s content just to act like you’re not even there. 

Reiji:

-It irritates him horribly that his father thinks he needs someone to look after him, and he treats you with barely disguised disdain from the very beginning, finding creative ways to circumvent your supposed authority. 

Ayato:

-He outright rejects that fact that you’re supposed to be there as something of an authority figure, and torments you at every turn. He’s as bad as a bratty little kid… and completely misses the irony in that he acts that way. 

Kanato:

-He loudly complains from the very start, and is worryingly likely to react with violence if you try to do anything he doesn’t like. He does not like the idea that his father sent someone to watch over him, and openly says as much.

Laito:

-For the most part, he treats you with flirtatious advances and generally inappropriate behavior. Laito has about two settings when it comes to interacting with people, and you fall under the “target” one. 

Subaru:

-If scaring you off with violence doesn’t work, he gets horribly standoffish and grouchy. The idea that his father wants someone to look after them is beyond annoying, and he’s openly hateful towards your presence in the house. 

Ruki:

-While he’s hesitant to do anything to disobey his adoptive father, he also doesn’t like the idea that anyone like you has been sent. He’ll obey Karlheinz’s wishes, but it’s pretty clear that he’s not pleased with the situation. 

Kou:

-He acts friendly enough at first, but his personality can flip in an instant. As long as you don’t do anything he doesn’t like, he’ll treat you decently, but if you try to control him in any way, he gets dangerously upset. 

Yuuma:

-He’s not pleased at all with the idea that he needs to be looked after, and the only thing keeping him from reacting violently is that it’s his adoptive father’s orders. He’ll put up with you, but it’s clear that he’s not happy. 

Azusa:

-He doesn’t mind the idea at all, and actually seems sort of happy that you’re there. Of course, he does seem set on you hurting him (and doesn’t really take no for an answer), which can become a problem when you refuse. 

Carla:

-Horribly offended by the very idea that you present, he treats you about as rudely as is possible. He’s cold, unpleasant, and openly condescending, and treats you like you’re lower than him in every way imaginable. 

Shin:

-He’s more or less a nightmare to deal with, and makes more trouble for you than you could imagine. He finds it funny that you think you can control him… but is equally likely to get angry and violent when he’s annoyed. 

Admin Mawile: (,,꒪꒫꒪,,) Oh dear… And this is assuming that circumstances (Karl) are forcing them to go.

Shuu:

-If he doesn’t fall asleep while he’s there, it’ll be a miracle. He doesn’t appear to care in the slightest what’s going on, and will only show a reaction if the doctor does something that distinctly bothers him. 

Reiji:

-He’s decently mature about it, if a bit irritated that anyone honestly thinks he’s incapable of handling himself. He’s also pretty likely to argue with the doctor, considering that he thinks he’s more likely to be right than they are. 

Ayato:

-The whole situation seems to be dragging up bad memories, and you’ll be lucky if he doesn’t try to escape. He acts like a complete kid about it, and whines and complains the whole time about him having to see a doctor. 

Kanato:

-He actually seems to be sort of scared… which ends in him screaming at you because it’s somehow your fault. This isn’t abnormal for him, but it only gets worse the more distressed he gets, and he can get pretty violent. 

Laito:

-While he’s not exactly hard to deal with, he’s still pretty much set on making a nuisance out of himself. If the doctor is female, she’s going to have to deal with Laito’s usual, and that alone might get you kicked out in a hurry. 

Subaru:

-He seems to be more annoyed than anything, but doesn’t complain unless the doctor specifically gets on his nerves. Considering his high pain tolerance, it’s pretty hard to do anything that does any more than annoy him. 

Ruki:

-If he has to be there, he’ll tolerate it, but it’s pretty clear that he’s not pleased with the situation in the slightest. Chances are, he’ll subtly insult at least a couple people in the one immature moment he’ll let slip. 

Kou:

-He gets a little whiny, but you can kind of tell that he’s more distressed than he lets on. Being handled by someone strange is a good way to bring back some bad memories for him, and it’s obvious that he’s pretty uncomfortable. 

Yuuma:

-He’s a bit annoyed but doesn’t mind the situation too much. He’s more or less just going along with what Ruki told him too, and chances are, he knows that he’d be in trouble if he did anything to make a scene. 

Azusa:

-He doesn’t care too much about having to see the doctor, but is all too likely to try to pester someone into hurting him. You’ll be there to keep him from being too inappropriate, and remind him that doctors aren’t there to cause pain. 

Carla:

-He’s horribly, horribly rude, and acts like he’s above every person in the building. It’s nearly impossible to get him to do anything, and he seems to be convinced that he doesn’t have to listen to anyone there. 

Shin:

-He’s angry and snappy, and is basically acting like an irritated child. He’s probably never had to see a doctor in his life, and has absolutely no idea how to behave, beyond openly expressing his displeasure with it all.