I just tagged another image with her as Volcano, which seemed to lump it in with unrelated stuff, so I removed the tag. That said, Volcano is the name I know for her, too.
Did some poking--I don't know how to romanize the first katakana in the name the Japanese Disgaea 4 site gives her, but the other three are ルカノ. That's "rukano," which seems to fit the "Volcano" we've been reading elsewhere.