All the masters quests and trials for Mentor Gohan and Videl in Dragon Ball Xenoverse! The purpose of doing master quests and training with Gohan and Videl is so you can learn their attacks like Eagle Kick, Hawk Charge, and Justice Combination for your created character. There is no specific place you can find these two, their appearance is random until they becomes your mentor. If you see Gohan and Videl in Toki Toki City, you can ask them to mentor you and then they will always stand in front of the statute in the game.
These are the master quests for Gohan and Videl in Dragon Ball Xenoverse
00:00 Stay Faithful, Gohan!
03:22 Come at Full Power, Gohan!
06:13 Mystery Hero!?!
11:50 Sparring with Gohan and Videl