R2D2
Throughout the three years of the Clone Wars, R2D2 was Anakin’s loyal helper and sidekick. 20 years later, Artoo would be paired with Anakin's son, Luke, to destroy the Death Star.
Hobbes
The question of Hobbes' true appearance is never divulged. Watterson has stated that Hobbes is both a stuffed toy and a real, living tiger. It depends on which other character's point of view is prominent at the moment.