Bubblegum

Bubblegumedit | edit source
Bubblegum is first seen sitting next to Chewing Gum in the normal universe, listening to music and humming.

Redesign (credit to retrobot for drawing it and Jess Jaffa for making it available on the community tab on her YouTube channel):

https://yt3.ggpht.com/R6HPKj_a970Li9n5lLrMKFWB_2O2rv5rtfzaKWIBjDAEEv3JOA-QzF4HV38bopcZegxff13efKPAWg=s1000-nd