Rose comb brown leg horn.
With your climate you want small combs, leg horns have historically proven feed conversion rates.
"Friendliness" is up to the individual bird, it's not breed specific.
It's really a bad idea, it's almost guaranteed death for both chicks.
If one yolk is fertile, the other will go bad and kill the living yolk, if both are fertile, they'll die halfway from no room.
Not definite on gender however the skin/comb color and comb shape would be a pass for me.
Can they get a picture of the comb with feathers out of the way?