Junior

"I feel like throwing my allies at the enemy is... awesome!"

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Junior's Appearance in Heroes Don't BiBi(英雄别闹)
Junior itself wasn't a sentient character after all but the bird perched on top of his head, was.

Junior in the series is controlled by Oreand the Crispy Chicken(the bird above Junior's head). The Crispy Chicken is actually an out-of-luck gambler who is on the run from the Skeleton Army thanks to his massive debt to Shakedada. But with Jay's help, Oreand finally got his Summoning Jewel back, summoning Junior and defeating Shakedada.

Oreand is highly honored in the Magic Institution and became the lead detective to solve a murder case in the Library.

In the final battle, he was forced to recharge the Summoning Jewel and ended up over-exhausted, lending the use of Junior to Jay.

Trivia

 * Junior himself is immune to Magic Damage, and his Flying Fist makes it a painful punch with a chain to limit his reach.
 * Junior's Summoning Jewel operates on what seems to be electricity and has a limited amount of uses until the battery runs out.
 * The top of Junior's head is a control seat to operate him.