Once, during a rainstorm, Tael and his sister Tatl befriended the abandoned Skull Kid. The three got along very well, even though the Skull Kid's mischievous side would at times surface. Tael appeared to pay no heed to the Skull Kid's increasing menace, even when he stole Majora's Mask from the Happy Mask Salesman.
However, when the three encounter Link in the Lost Woods, Tael is separated from his sister, and, being in the company of the changed Skull Kid, finally understands his true motives. When Tatl and Link confront the Skull Kid at the top of the Clock Tower on the Final Day, he tells them about the Four Giants, the only ones with the power to stop the Moon from destroying Termina, although he is knocked back by the Skull Kid, causing Tatl to tell him off and become even more determined to stop him.
When Link calls the Four Giants, Tael is reunited with Tatl. However, here, it is evident that he has become stronger, as he calms Tatl down when she is afraid, mirroring Tatl's behavior during the rainstorm. In addition, he attempts to explain to Tatl that Majora's Mask drove the Skull Kid to commit his evil deeds. Tatl does not believe him until Majora's Mask speaks and reveals that it had been using the Skull Kid as its puppet. If Link resets the three day cycle after this point and again summons the Four Giants, Tatl will already understand what Tael is about to say, much to his surprise. When Tatl initially refuses to accompany Link up to the Moon, Tael bravely offers to go in her place, telling his sister that perhaps if he had been stronger, the Skull Kid would not have done the things he did. It is this that convinces Tatl to go with Link.
At the end of the game, Tael presumably comforts his sister as Tatl watches Link depart on Epona.