King Groot (Earth-TRN517)
Treebeard
for Treebeard in Lord of the Rings if fictional characters made it
Suggested by caitlinfrost
I'm going to, of course, ignore Rings of Power. As usual, no real people and no characters from LOTR. I might be a bit more flexible about gender-swapping roles for this one because LOTR has very few female characters, though.
