I have 2 sugar gliders as the title says.

Female: Taki
Male: Stitch

Taki is a VERY playful sugar glider and always rushes to the cage door when she sees me. Stitch is almost the opposite, I'm still trying to bond with him (since 3 weeks).

I need to know if Stitch's behaviour is normal, or maybe he just have matured and wants a mate. I don't want a situation where one kills the other :(

Should I get another female but older? Or replace Stitch with a younger male??

I don't understand why you think one would kill the other?

Why is stitch's behavior NOT normal, you give no abnormal description. Just that he acts opposite?

we have 12 glider, none acts like the other. 12 different distinct gliders.

3 and 4 months old, that doesn't seem like an age difference that would matter at all. they are basically the same age.

I also don't understand the problem sadly.