ohh man, I'm sorry for the totally useless comment here, but I just had to tell you what I guessed before I went to bed because my brain wouldn't have been able to shut off, lol. The one's without question marks are the ones I was pretttty sure were right, but even then things are rarely what they seem. I probably got all of them wrong with my luck! XD

man reading - Zexion
homeless man - Demyx
mother - Lexaeus
couple - Axel? and Roxas?

teen - Luxord
granny - Vexen?
businessman - Saix?
co-ed businesswomen - Larxene?
man with flowers - Marluxia
child - Xaldin
father - Xigbar?
unusual man - Xemnas