Personalities (4)
(Other definitions for characters that I've seen before include "Signs" , "Eccentrics" , "eccentric people?" , "Persons in a play/book" , "Roles; letters" .)
'personalities' is the definition.
(ego can mean someone's personality or self)
This is all the clue.
(Other definitions for egos that I've seen before include "Lots of self-esteem" , "feelings of self-importance" , "Self-images" , "People's personal pride - the parts of them that are conscious" .)