Kaiju No. 8 [Fortitude 9.8] is a 5★ Blunt Attacker defined by his high base stats and powerful permanent self-buffs. While he cannot equip Weapons or Uniparts, his raw strength and scaling mechanics allow him to perform at full power without external gear investment.
His Combat Skill can instantly defeat small-sized Kaiju with 50% HP or less, giving him a unique advantage against troublesome enemies and allowing teams to quickly remove high-threat targets. This execution-style ability makes him especially valuable in stages with multiple small Kaiju.
Kaiju No. 8 also provides frontline control through his Normal Attack, which applies Provoke and increases his own DEF without consuming SP. This allows him to protect allies while maintaining flexibility in team compositions, acting as a durable frontliner rather than a traditional Defender.
His core mechanic, Fighting Spirit, grants permanent stacks that increase ATK, DMG dealt, and Ultimate damage, up to five stacks. These bonuses are easy to build, as he gains stacks not only from attacking, but also from taking damage, allowing his power to ramp up naturally during battle.
As you progress his Ascension, Kaiju No. 8 becomes increasingly self-sufficient. At A2, he can remove his own debuffs, and at A4, he gains the ability to self-heal, further improving his durability in extended fights.
While he offers some defensive utility, Kaiju No. 8 is not a replacement for a dedicated Defender, as he lacks team-wide shields or healing. Overall, Kaiju No. 8 [Fortitude 9.8] stands out as an S-tier Attacker who delivers strong, low-maintenance performance with minimal gear dependency.