lion with a trimmed mane and dyed-in stripes. Purpleish because its a dye made from berries and is as close as he can get to black with what he has.
Deuxi was captured by a zebra tribe that rivaled his father's pride, and he integrated into their society and takes their side in the conflict, etc etc.
Haven't thought up a good reason for the double stripes yet. Let's just call it a strange gene thing for the sake of character identity.