Seek wasn’t cooperating with an ID.
What’s the best way to deal with them?
I think the larvae eat more aphids than a full grown ladybug.
Hopefully this is not indoors or your might only have the option of insecticide / oil soap which in my experience didn't work well.
The next time I get aphids in my greenhouse, I'm pulling the infected plants out entirely and either transplanting, harvesting early, or composting.