Guide
How the kit works
Basic Attack: Hu Wei attacks automatically during combat. Its hits grant 20 Might, up to once per use of a skill, and Ju Fufu can hold up to 200 Might. With enough Energy, use EX Special Attack: Tiger Seven Forms Alt - Mountain-Descending Savage Tiger (Special) for 80 Might and 3 Momentum. She is invulnerable during the attack.
After a Dash Attack, hold to enter Dash Attack: Tiger Seven Forms - Mountain King's Game. If she has Momentum, contact consumes one point, changes the hit to Fire DMG and grants 25 Might. Switch characters while she is spinning and Ju Fufu stays in that state, chasing the nearest enemy. She is invulnerable while spinning off-field.
When a Momentum-consuming spinning hit deals Fire DMG and her Might is above 100, it automatically consumes 100 Might to trigger Chain Attack: Suppressing Tiger Cauldron. A separate Core Passive trigger activates the same attack when Hu Wei hits off-field with at least 100 Might. These thresholds are different: the spinning trigger needs more than 100, while the passive needs at least 100.
Tiger's Roar grants 20% CRIT DMG to the squad, plus 20% Chain Attack DMG and 40% Ultimate DMG. With at least 2,800 initial ATK, every extra 100 ATK adds 5% CRIT DMG, up to another 30%. Repeated triggers refresh its duration. Use her Ultimate at maximum Decibel Rating for 6 Momentum and 100 Might, or use a Defensive Assist to parry and deal Daze.
Build and why
Use four pieces of King of the Summit with two pieces of Astral Voice. King of the Summit adds 6% Daze and gives the squad 15% CRIT DMG when Ju Fufu uses an EX Special Attack or Chain Attack. At 50% CRIT Rate or more, it gives another 15%. The buff lasts 15 seconds and can be refreshed. Astral Voice adds 10% ATK with its two-piece effect.
For main stats, choose Percent ATK or CRIT Rate on disc 4, Percent ATK on disc 5, and Percent ATK or Impact on disc 6. Look for CRIT Rate, Percent ATK and CRIT DMG substats in that order. The 50% CRIT Rate target unlocks the full set buff, while initial ATK improves Tiger's Roar above its threshold.
Roaring Fur-nace is the first weapon choice. It increases the Daze of her EX Special Attack, Chain Attack and Ultimate by 28%. Fire DMG from a Chain Attack or Ultimate also raises squad DMG by 10% per stack, up to two stacks. Hellfire Gears is an alternative for off-field Energy Regen and Impact after EX Special Attacks. Blazing Laurel is another option for Impact after an assist and CRIT DMG for Fire and Ice hits through Wilt.
If King of the Summit is unavailable, four-piece Swing Jazz is an alternative: a Chain Attack or Ultimate raises squad DMG by 15% for 12 seconds. Proto Punk is another option, giving the squad 15% DMG for 10 seconds after a Defensive Assist or Evasive Assist.
Leveling priority
Follow the game's order: Core Passive first, then Chain Attack, Special Attack, Assist, Basic Attack and Dodge. Core Passive supplies Tiger's Roar, while Chain Attack covers an attack Ju Fufu triggers repeatedly. Special Attack comes next for the Energy-based move that supplies Might and Momentum.
For maximum ascension, you need 800,000 Denny, 4 Basic Stun Certification Seal, 32 Advanced Stun Certification Seal and 30 Buster Certification Seal.
To max all skills, you need 2,905,000 Denny, 25 Basic Burn Chip, 75 Advanced Burn Chip, 250 Specialized Burn Chip, 5 Hamster Cage Pass, 9 Exuvia of Refinement and 60 Higher Dimensional Data: Miasmic Elytron.
Mindscapes worth it
Super Scary Little Tiger is a good upgrade to consider first. It grants 100 Might on entering combat and 12% CRIT Rate. When Ju Fufu's Chain Attack hits a Stunned target, it also increases that target's Stun DMG Multiplier by 35% for 30 seconds.
Almighty Qingming Warrior is worth considering for another 22% CRIT DMG during Tiger's Roar. It also gives Ju Fufu 3 Momentum whenever any character uses an Ultimate. For her own damage, Roar of My Inner Tiger increases Chain Attack DMG and adds three popcorn hits when she consumes Momentum and hits during her spin.
If you are stopping earlier, M3 and M5 raise skill levels, while M4 adds CRIT DMG only for Ju Fufu during Tiger's Roar. Those are less focused on team buffs than M1 and M2. M6 is an upgrade to skip if you are content with her support without the extra personal damage.
Teams
Bring an Attack or Rupture character to activate Additional Ability: Aura of Authority. It increases every squad member's maximum Decibels by 1,000. When an Attack or Rupture character uses an Ultimate, that character gains 300 Decibels. The kit does not require the damage dealer to share Ju Fufu's Fire attribute.
Common mistakes
Do not leave Ju Fufu on-field for the whole rotation by habit. Start her spinning attack and switch when you want another character active. Also watch Momentum: without it, contact during the spin deals Physical DMG rather than consuming Momentum for a Fire hit and Might.
Do not assume exactly 100 Might triggers the spinning version of the automatic Chain Attack. That trigger needs more than 100; the off-field Hu Wei trigger needs at least 100. When building King of the Summit, check CRIT Rate instead of assuming its second 15% CRIT DMG bonus is always active.
During the third hit of Basic Attack: Tiger Seven Forms - Flaming Claw, repeated presses maintain the combo. Hold or pause before pressing if you want to move into the fourth hit. Ju Fufu takes 40% less damage during the third hit, but she is not invulnerable there.