I'm sure you have your three favorite characters that you stuck with in the different parts of the game, so I'd like to know who they were and why (i.e., because of their righteous stats or just because they looked cool).
Between the beginning of the game, and Serge's body trade at Fort Dragonia:
White: Serge (default character, good stats anyway).
Blue: Leena (how could I not? she's so cute!)
Red: Kid (Pillage Technique, decent stats).
Yellow: (didn't like any of the Yellow characters at this point; Poshul is lame).
Green: Glenn (good stats, reminded me of the Glenn from Chrono Trigger).
Black: Guile (decent stats, magic-oriented character; the rest of the Black characters were cornballs).
After Serge gets Lynx's body, up until the time he gets his original body back:
Black: Lynx (default character, good stats, the rest of the Black characters are cornballs).
Blue: Fargo (good stats, Pillage technique).
Red: (all other Red characters besides Kid are weaksauce).
Yellow: Norris (not particularly great stats, but he looks so cool!)
Green: Karsh (second-best character in the game, stat-wise).
White: Starky (don't really care for kawaii extraterrestrials, but he has good stats).
After Serge gets his body back, which characters prevail?!
White: Serge
Blue: Fargo
Red: (still no one...)
Yellow: Norris
Green: Karsh
Black: Grobyc (decent stats)