| Unseen playmate |
| Invented playmate |
| Hobbes, to Calvin |
| Hobbes, for Calvin |
| Childhood playmate |
| Lonely kid's playmate |
| Make-believe playmate |
| Childhood pal, perhaps |
| Playmate for the lonely |
| Childhood chum, of a sort |
| Childhood playmate, perhaps |
| Hobbes in "Calvin and Hobbes |
| Any of the starred answers, some say |