Sensei is the one who initially arranged for Ron to be part of the transfer program to Japan, which would bring him to the Yamanouchi, in order to protect the Lotus Blade from Monkey Fist. He was also the one who secretly arranged the adoption for Ron's new baby sister Hana, so she could be prepared for her eventual showdown with Yono the Destroyer. When the world was in danger from the Lorwardians, Sensei apparently sensed what was coming as he tried to warn Ron about it, but Ron misunderstood his message. Later, he appears to Ron when Kim and Shego are knocked out and helps him get the courage to summon the full strength and power of his dormant tremendous Mystical Monkey Power, informing him of his role as the Ultimate Monkey Master and assuring him it is his destiny which he is finally ready for. During Ron's fight, Sensei comments "his monkey power is strong, booyah!"