The affidavit from Probate section 13100 has a requirement to include a statement that the affiant is the successor to the decedent,
or is authorized to act on behalf of the successor.Seems to me, this would enable the daughter's attorney-in-fact to act on behalf of the daughter. Or, to make things even more simple, the daughter could just flat-out authorize the other person to act on her behalf and claim the assets.
Of course, as my tag-line says, I'm not a lawyer (nor do I play one of TV)

, so you may want to check with your corporate counsel.
By the way, the LA Superior Court has a nice publication describing
"Transfer of Small Estates Without Probate". Better than any I've seen from courts around here....