Shishiwakamaru — Yu Yu Hakusho: Slugfest

Shishiwakamaru is a debuffer who combines whole-team stat reductions with turn-by-turn Skill Point denial. His skill Chorus of a Thousand Skulls attacks all enemies and applies dispellable ATK, DEF, Final Damage Boost, and Final Damage Reduction penalties that stack up to three times and last the entire fight. His passive Soul Shatter saps enemy Skill Points every round after the first.

Milestones

Starting from Turn 2, Soul Shatter drains 50 Skill Points from every enemy at the start of each turn.
adds a 50% chance to counterattack when struck by an enemy Basic Attack once per turn, plus a permanent 20% Final Damage Reduction buff the first time his HP drops below 50%.
raises the damage reduction threshold to 60% HP and increases the reduction to 30%; allows two counterattacks per turn and raises the trigger threshold to 70% HP.
increases the per-stack penalty of all four Skill debuffs from 5% to 8%.

Minimum viability: . The turn-start teamwide Skill Point drain establishes his active battlefield disruption. Earlier investment offers only his base whole-team debuffs and self-stat increases. Later investment adds personal counterattacks, survival triggers, and stronger debuff values.

Milestones

Starting from Turn 2, Soul Shatter drains 50 Skill Points from every enemy at the start of each turn.
adds a 50% chance to counterattack when struck by an enemy Basic Attack once per turn, plus a permanent 20% Final Damage Reduction buff the first time his HP drops below 50%.
raises the damage reduction threshold to 60% HP and increases the reduction to 30%; allows two counterattacks per turn and raises the trigger threshold to 70% HP.
increases the per-stack penalty of all four Skill debuffs from 5% to 8%.