Quadal contains canon Hero Factory information.
Quadal's origin's are unknown, but he was probably not made in the Assembly Tower as he is not a Hero. Quadal assists Nathaniel Zib by designing new armor and observing missions. More recently, he assisted in modifying the Heroes into their future Upgrades.
Quadal has at least four arms and only one eye. He talks with a language composed of beeps and boops (like R2-D2 from Star Wars).
The H Team (briefly)
Three to Tango (cameo)
The Heroine (mentioned only)