Umm not really. This guy is more like he can either cast tarukaja, sukukaja or rakukaja on him. And his special move it to cast all kaja on himself
So it's not like Jam that she power up only some of her move.
But the second character does sounds like Biken. I actually didn't know that Baiken can do that, even though I play Guilty Gear lol. (I use only Ando and Bridget anyway :P) However, I think in Akatsuki BK they focus more on that for this character, as he only have two special attacks and other are all curse attack. (His special move is to put ALL CURSE to your opponent = =
Anyway here's the link to the official site
http://www.eonet.ne.jp/~subtle/akatsukibk/akatsukibk.html
My favourite character is Anonym, the gunner nun. XD Her unique ability is that all of her moves require a bullet, and you can carry 6 bullets at a time. So it's kinda challenging to decide when to reload and when to attack.