Jude, Leia, Milla and Elize (mainly played as Jyde or Leia)
Jude, Leia and Elize are healers; Leia and Elize can revive and Jude can revive too, if he's your support unit.
Never liked using Alvin in both parts, because his attacks are slow and he's a rather bad support unit.
Character you play the most in Xillia 2?
(but I think to know your answer already)