Okay, I'm actually a fur of multiple personalitiescharacters, but these are my most common:
Terry Rand Mitchell:
This is my old "default" character, back when I identified more as a rodent than a canine. In all of Mr. Mitchell's incarnations, he's been a rat (not a mouse), and usually armed; he first came into being back when City of Heroes was still around (and I played him as part of a trio of rat siblings that were all made by the same scientific foundation, Forward Motion Laboratories) and a former criminal-turned-hero; his second incarnation was when playing another game of Warehouse 23 (a GURPS setting) as a tabletop RPG character who was more stylized after common protagonists from the Silent Hill series of games) — he started the adventure out with a steel pipe, a broken AM/FM radio, and a standard handgun. Also, I played him to be a complete jerk.
Malcom is my current incarnation, a lime green husky working as Chief of Security for [REDACTED]. Much like the second incarnation of Mr. Mitchell, Malcolm always appears in a three-piece suit (though, also like Mr. Mitchell, he never leaves the suit jacket buttoned up), but he also rocks a single-barreled, pump-action shotgun. Also, unlike the second incarnation of Mr. Mitchell, so long as Malcolm stays in good standing with [REDACTED], he will never die (except perhaps of old age); every time he gets gunned down in the line of duty (or even off of it), he gets replaced by another clone. While he's long since lost track of how many times he's been killed since starting his work with [REDACTED], he's actually somewhere on his 400-500th clone now.