is jujutsu kaisen episode 26 filler?

Riko introduces herself and the trio begins the escort mission. Trouble arrives immediately — a massive bounty has been placed on Riko's head, drawing assassins and curse users from across the jujutsu world.

Gojo and Geto handle the threats while Riko visits her school for the last time, saying goodbye to the life she's about to leave behind. The mission's emotional stakes become clear: they're not just protecting a vessel, they're protecting a girl who hasn't finished being a teenager.