: This could be correct but they could still be 2 people.
: Just because she could be a female myrmidon doesn't
: mean shes bonesplitter.
Bonesplitter is obviously a Myrmidon name. If Shiver was a Myrmidon but not Bonesplitter, this would mean several things.
1. There are at least two powerful Myrmidon sorcerers.
2. Shiver was one of the other Fallen. Since she is not the Faceless Man, that would make her the voiceless one. This doesn't seem to fit what we know of her. She was a loud-mouthed braggart.
Neither of these seems particularly likely.
: And she doesn't really look like a myrmidon either.
Yes, she does. Her form in Myth 2 is not her true form, but a physical projection of her soul which Soulblighter captured with Tramist's mirror. Her true form can be seen in the loss screen for a Traitor's Grave and in Tales from Myth: The Fallen Lords. She's bony and dry-looking, though not as far decayed as most of the Myrmidons. Her magic or the fact that she's not getting into physical battles could be preserving her.
: And anyoen can be vane. My girlfriend was vain but she
: wasn't a mymridon. OR WAS SHE?!?!?!??!?!?!?
That was just supporting evidence. Since those are the only times vanity comes up in the story, it's safe to assume a connection.