Ame:
She would respond depending on the person, but if it was a man, or a stranger she would probably blush, panic and maybe faint. She does not do well with physical contact and can barely manage something so simple as a cheek kiss.
Jellal:
One would receive a 'Don't fucking touch me' glare, but that would probably be it. If his wishes were respected that would be the end of it, if the person tried again, they would end up with the barrel of a gun in their face rather quickly.
Dalain:
-headbutts- Irregardless of gender or reason. Angry little Xaela does not like affection.
N'akani:
"Just the cheek?" She would most likely flirt with the person.
Tsirae:
He would accept it as a form of greeting and probably remain unphased by it. That is not unusual for nobility, and would be nothing special to him.
Kilanii:
"You'll need to buy me a drink first." While not overly interested in contact, she would not become angry or defensive unless the person continued to be pushy beyond the cheek kiss. Then they'll get a swift hit from her axe.