Marvel Legends Spiral
1) I think she has some sort of association with the X-Men. What that association is, I do not know. But I seem to recall her appearing in the cartoon at some point.
2) She was a playable character in the arcade fighter 'Marvel Vs. Capcom 2' - this was probably my first exposure to her.
3) She has six arms.
4) She likes swords.
5) Umm, I think she's an alien?
Yeah, that's about it. I made it to five.
She also has like ten million points of articulation and is a surprisingly attractive sculpt for a figure with six arms. I am certain pulling off such a design was no easy feat, so kudos to whatever Marvel Legends designer pulled the short straw on this assignment.
So when Marvel Legends released her in action figure form way back in 2008, I had to have her regardless of my lack of familiarity with the character. As is generally par for the course for retailer exclusive action figures like Spiral (she was a Target exclusive), I couldn't find her at retail back then, but lucked out on finding her at the flea market in 2010 for a mere five bucks.