A side character not planned to be used more than at the start and end (spoiler 0.0)

Alex is the main character's best childhood friend. They don't take part in the main story more than being a motivation for the character.

In other words, it's a bit of a low-commitment VA job if this works out well. 

If you were to want to continue with another role once you've landed this one, there's no doubt you'll get one.