A terribly-power being who devoured the ancient God known as Yatagarasu, gaining his awesome powers, giving her the ability to openly control nuclear fusion.
Her signature move (Giga-Flare~ Subterranean Animism) she creates two gigantic stars, which both constantly spew a maelstrom of vicious projectiles.
Although extremely powerful, she's well.......a bit stupid, actually the fact that she was able to even find Yatagarasu is pretty amazing.
Ichigo Kurosaki (Hollow)
A once normal human 15 year old, turned into a spirit reaper by a woman named Rukia, he quickly rose through the ranks and became a force to be reckoned with, attaining his hollow form his strength and speed become even more ridiculous.
His signature move (Getsuka Tensho) launches a powerful burst-wave over a very large area, and can even be done in rapid succession. The strength of his signature move also incrase in his hollow form.
Although he is a quick thinker, and fairly persistent combatant, at times he does act a bit....well....slow, for example, stopping in the middle of intense combat to make a statement, or better yet, playing the 'cool guy' act and accidently under-estimating his opponent. (not exactly what you want to do when you're facing down someone like Utsuho.)