Yun Jin's Elemental Burst grants Normal Attack DMG bonus to teammates based on her DEF, making her a specialized support for physical and Normal Attack-focused carries. Pair her with on-field characters like Ayaka, Hu Tao, or Alhaitham who rely on frequent Normal Attacks to maximize the buff's value. Build her with DEF-scaling artifacts and prioritize DEF substats; Favonius Lance or similar ER weapons help her maintain Burst uptime.