Tamaki~
He will take care of you. Even though you don't want him to. He literally won't listen.
Hikaru~
He will act like he doesn't want to be by you but really he wants to take care of you. However, he stays away from you until you're not sick anymore. Only because he don't want to catch what you got.
Karou~
He will be by your side 24/7. Makes you any soup you want and he will risk getting sick.
Haruhi~
She loves you too much to leave you alone to take care of yourself, so she stays with you.
Kyoya~
He stays and helps you get better. With his help you get over the sickness within 2 days.
Hunni~
He doesn't really know what to do but being the little adorable boyfriend he is, he will stay by your side and share cake with you. He also cries when you don't feel good.
Mori~
He will help you get better and if it don't go away, he will take you in to get seen.