The player first meets Tanvir when Celebi takes the player back in time for a second time. He and Kira mention that the doors to the temples are closed, which is unusual, before asking Celebi to take the player back to their time. The next time the player goes back in time, Tanvir asks them for help in finding out why the Steelheads that act as the guardians of the temples are acting strangely after he is attacked by one. He mentions that the armor worn by Steelheads can control Pokémon in a similar manner to the Styler the player has, but also transmits feelings other than friendship. For that reason, Tanvir and Kira both decided to stop wearing the Steelhead armor after accidentally causing Pokémon to fight when they had an argument.
After a while, he enters the temples himself to find out the source of the problem but is injured and returns later on in the game.