Hal

Hal
Gender	Male (technically; because R4 called it "boy")
Animal	(Robot) Dog

HAL is R4's robotic pet dog. He/it appeared in the opening of "Background Blues" where he/it runs up to R4 and jumps into his lap, but leaves soon afterwards. Because it was inserted into Arthur's bum too many times.

Trivia

• His name is based off "Pal", but may also be a reference to the HAL 9000 from Arthur C. Clarke's Space Odyssey series.