Looks like a Red Sex Link (aka Cinnamon Queen, Red Star, Red Comet, Gold Comet, ISA Brown, etc., etc.)
And yes, pullet as it is red with white trim. (A male would be coming in mostly white with some red on the wing bows).
Temperament is not the best indicator of gender. I've had sweet boys and snotty girls. Comb development is a much better indicator, but with the color coded sex links, chick down (and later adult color) is all you need to know for certain.
CQ pullet.
LofMc