Aerith:
1) Can your character hear his telepathic voice? Yup.
2) Can Kyuubey know your name through mind magic? Sure
3) Can Kyuubey invade personal space? Sure, do it!
4) Can Kyuubey steal my noms? She would probably share anyway.
5) Are you interested in having your character contract with Kyuubey at some point? I will say sure, who knows what the future will bring? :D

Meg:
1) Can your character hear his telepathic voice? Yup.
2) Can Kyuubey know your name through mind magic? Sure
3) Can Kyuubey invade personal space? She would throw him out a window so fast, so probably better to be safe and not get in Meg's personal space, cabbit. >:]
4) Can Kyuubey steal my noms? Hale no.
5) Are you interested in having your character contract with Kyuubey at some point? Nope, her wishes are definitely not something to be inflicted upon the general masses, I'm sure.

Homura:
1) Can your character hear his telepathic voice? >:(
2) Can Kyuubey know your name through mind magic? >:(
3) Can Kyuubey invade personal space? >:(
4) Can Kyuubey steal my noms? >:(
5) Are you interested in having your character contract with Kyuubey at some point? >:(
All of those answers are yes btw