Grams Bear and the Mask #4

Follow the return to her music career; Grams Bear and the Mask #3 Grams is still enjoying her newly discovered youth through the Mask, but she misses her little darlings Hugs & Tugs and returns to Care-Alot with a strange proclamation; she will only wear the Mask on a part-time or (if be) an emergency basis, otherwise she will leave the Mask to her next-of-kin.

Can anybody guess who that'll be?