Laslow’s Blade
If unit is within 2 spaces of a female ally, grants Atk/Def+4 during combat.".
Refine:If the number of female allies within 2 spaces ≥ 2, if unit initiates combat, unit attacks twice.".(Even if foe initiates combat, unit attacks twice.)
Or
At start of turn, grants Spd/Atk+4 to adjacent allies for 1 turn.
Refine:If the number of female infantry allies within 2 spaces ≥ 2, if unit initiates combat, unit attacks twice.".
(Even if foe initiates combat, unit attacks twice.)
Answers
If they do a refinement odds are it'll be more focused on his ability in Fates. Something like an additional rally skill or a more probable outcome would be a Link skill like Odin's weapon.
The odds IS will start adding gender based skills is lower than you getting 5 5*s in a row at 3%. It just isn't going to happen.