The reason of why I bothered trying Skullgirls is mainly because of the possibility to play a solo character. That, and the commands are simplified, unlike the Street Fighter games and other tag-team games.
Anyway, who do you think would go solo great? It's mostly because I hesitate between Filia and Valentine (Filia because she's easy to pick up and Valentine because of the appeal).
P.S.: Don't ever suggest a team. We're here to discuss Solo characters.