Last boss the girl's shield regens fairly fast. It's also color coded. It can take a fair bit of damage in general. The little ones aren't that damaging so long as you don't let them hit consistently. I died taking damage more often than losing the shield actually.
Personal tactic was to just stick on one side and shoot arrows to the other side to clear it.
Personal tactic was to just stick on one side and shoot arrows to the other side to clear it.