In JJS, you usually can’t change your avatar truly mid-fight unless the game mode or a specific game pass/mod feature allows it. Most normal character switching happens from the lobby or a character menu, and one guide notes you need to be out of combat for a few seconds before switching characters in Jujutsu Shenanigans.

What people are referring to

A few different things get called “avatar changing” in JJS:

  • Regular character switch: done from the character menu, not during active combat.
  • Awakening outfit / ult-related swap: some posts suggest you can change appearance around awakening or ultimate use if you own the relevant pass.
  • Custom or mode-switch builds: some Skill Builder tutorials show swapping movesets mid-fight, but that is about custom builds, not a normal avatar change.

Practical answer

If you mean the standard game , the answer is no: open the characters menu, pick the character, and equip it before the fight starts.

If you mean a special outfit or custom setup , then it may be possible with the right game pass or build, but that depends on the exact feature you’re using.

Quick steps

  1. Leave combat or wait until the game allows switching.
  1. Open the characters menu or lobby character area.
  1. Select the avatar or character you want.
  1. Equip it before re-entering the fight.

TL;DR

You generally cannot change your avatar mid-fight in JJS in the normal way; you have to switch beforehand, unless you’re using a special awakening, outfit, or custom mode-switch feature.