One source of ideas for your characters in a game is your real world knowledge. This is obviously handy in a game set in the modern day. But it can also be useful in games set in the distant past, far future, or alternate realities. You just need to be slightly creative in adapting the terminology and technology to the setting.

Or don't bother at all and just claim you can dual-wield a crossbow in each hand because you can clearly demonstrate that you can do it in Final Fantasy.

Transcript

[SFX]: Kabooom! Kabooom!
GM: That's the last of the PIEs gone. Clever use of EMP.
Leia: Thanks.
Chewbacca: I'm going to power down.
Han: Land on that big asteroid. It'll be safer.
Chewbacca: Yes.
Han: In there. That cave there.
Chewbacca: Roger.
Han: Because it's the right size.
Chewbacca: Roger that.
Han: We'll be able to park safely and do a three-point turn without incident.
C-3PO: Make sure you check your mirrors first!
Chewbacca: Quite, quite.
Leia: Three point turns are for wusses. Chuck a lateral flame-out.
C-3PO: Yeah!Like you showed me in the car yesterday!
Chewbacca: ... Aaaand no more lessons with Annie.
C-3PO: Awww!