Mich. Comp. Laws § 330.1632: Guardian as fiduciary.

Sec. 632.

Whenever the court appoints a plenary guardian of the estate or a partial guardian with powers or duties respecting real or personal property, that guardian shall be considered a fiduciary for the purposes of the estates and protected individuals code, 1998 PA 386, MCL 700.1101 to 700.8102.