Two Scottish Huntress'. Sisters from a wealthy, renown hunter father, and a biochemist mother.

Sinéad is a hotheaded angry woman bent on eliminating as many pack leaders from as many werewolf packs as she can so she can harvest the pure, strongest blood from them.
She herself is renown in the hunter world for developing the first successful vaccine against lycanthropy.

Kyara is a brutish, but mostly calm woman simply in it for the hunt, and to protect her little sister from harm. Acting primarily as a bodyguard, she's generally not known to have much personality except those who share a pint and some stew with her.

In HunterCanon these are the "villains" as it were. Kyara however is not evil, while Sinéad is more hellbent on her tasks, which, in some eyes can be seen as evil.