Panda

Panda was a 10 inch tall sentient, stuffed toy Panda who travelled with the renegade Time Lady Iris Wildthyme.

Biography
Panda originally belonged to Tom, at a time when Tom was writing about his travels with Iris Wildthyme. After Iris returned to Earth, Panda and Tom joined Iris in her travels around the multiverse. (BFIW: Wildthyme at Large)

After Tom returned to Earth to live his life as a journalist, Panda still continued to travel with Iris (BFIW: The Sound of Fear) though the relationship was often tempestuous with Panda frquently threatening to leave Iris. (A Romance in Twelve Parts).

At various times, Panda managed to get lost at the end of the Universe (Iris Wildthyme and the Celestial Omnibus), completely changed in size (Ms Wildthyme and Friends Investigate) and killed more than once (The Panda Book of Horror).

Panda sacrificed himself to save the multiverse from being invaded by his alternate selves by jumping into a rift while holding a bottle of whisky. (BFIW: The Panda Invasion) Panda did not die as he expected and was later saved by Iris Wildthyme and Santa. (BFIW: The Claws of Santa)

Iris more than once left Panda doing a mission for her while she went off to have more adventures. (CC: Find and Replace, 'Wildthyme in Purple'')

Personality
Panda was, at most times, bad tempered. He took offence at being called a toy. Like Iris, Panda drank heavily. He always carried a hip flask containing whisky with him as he felt that it kept him safe through dark times. (BFIW: The Two Irises)