If she's from a hatchery and lays blue eggs with a pea comb she could be a Prairie Blue Bell Egger. Basically a fancy easter egger with no beards/muffs. They have pea comb and can have black or black washed feet, but the feet and shank color can vary widely. Super hyper and active and curious, flighty, slim physique, adult weight of about 4-5 lbs all fit with her description and that of the PBB. My PBBs are a lot more easily startled than my ISA browns or BOs. They can become tame-ish to people, but are really good at free ranging due to the active/ alertness. They can have random colors show up in their feathers at certain ages and stay or go away again, because they're a mix.
Other blue options -
Sapphire Gem (brown eggs)
Andalusian (white eggs)
But she could just be a "new version" hatchery EE (those tend not to have beards or muffs) or a barnyard mix that lays any color.
Good luck figuring it out!