Only know T7 and Kira really well so far, but from what i heard about my other compaions I think it would work out like this for my Guardian:
Kira would be a good mom once she settled into the role (being a mom tendsot change a woman form what I here, so Kira might be a little less of a rebel once she become a mom i would think)
T7 and the droid that came with my shop would be the R2 and 3PO duo (T7's tanking abilty making him a good protectos I would think and the other droip would be a 'nanny')
Doc would probably be good care taker for the kid once the grond rules were set by Kira and me (being a doctor make it easy for me and kira to keep the secret drom the Order as well lol!)
Rusk I'm unsre of, his bio implies he wins at all costs when it cme to the Imps, but is aso a loyal kind of person so it might depends how well me and him mesh through out the journy (he would make a good bodyguard for the kid or kids I think)
Scourage is the only big issue among the Knights, as i saw a youtube vid about his story arc and one comment he made said he would see the 'mistakes' that were made in my training would not be reapted with my children so thter might be a small war breaking out on my ship with me and Kira on one side and Scourage on the other.
If he can be dealt with and is still breathing when the fight is over, he might be good extra protector of the kids for at least the short term (long term is a big question)
Now as for the kid him or her self, that would be scary, two powerful force users for the parents would mean a good chance of powerful force talents and who knows what skills if trained by me and kira (and Scourage if he can be 'leashed') and any other skills gained by the other crew memebers