Everybody knows Scar, right? Enormous narcissist, power hungry, etc etc?

He's also a lion so I'm sure some interesting jokes can be cracked.

BUT ANYWAY his real forte is doublecrossing things/people and being a manipulative jerk. Personally I think it would be interesting for him to doublecross both ship crews and try to play them against the middle for his own benefit.

Oh, and this was my speculation about what he'd be like as a shipmate.