Synalon
[12] Conqueror
So far, the soul charge states seem to expand on what the character can already do, either by enhancing attack properties or by adding new gimmicks. So I personally would prefer Tira's mood switch not to be confined to Soul Charge since this seems more of a restriction on the gimmick that the character already has. As others have said, managing her stances is an essential part of her gameplay. So putting Gloomy in Soul Charge takes away from that, when what it should do is add something new.