[He is not a desperate grounder, and he briskly bites back-]

I'm only dressed like one.

[Your clothes! Are wrinkly!! Alec!!

But even so, Rufus clicks his tongue at the set of questions.]

I'm not bad in a fight. No SOLDIER, but a good shot with a gun if you can find one for me. [Because he assumes that Alec's asking for a reason, and that reason would indeed require a bit of fighting and/or violence. This means the situation would be far more advantageous if he could have some manner of firearm holstered against him. As for an alias-]

You mean you're not just going to introduce me to everyone as "Junior", huh?