String Demon
String Demon is the final boss of Rose Kingdom, appearing at the end of Rose Kingdom Act 5's 15-wave Story stage alongside the Regen1, Reinforced, and Momentum modifiers. Regen1 lets it slowly regenerate health over time, Reinforced cuts all incoming damage by a flat 30%, and Momentum stacks a damage buff up to 50% the longer the fight drags on, which together make a fast, high-burst clear noticeably more efficient than a slow attrition fight.
Like every Boss-type enemy, String Demon carries a hidden tag that adds a flat 20% health multiplier and a 30% speed penalty on top of its listed stats, and caps incoming Stun and Rewind effects at 10 stacks rather than fully blocking them, since neither the Story wave nor its Expedition appearance carries the Immunity modifier.
String Demon also appears as the climactic threat in Rose Kingdom Expedition, both as the fifth encounter in that stage's elite gauntlet and as the enemy that directly assaults the defended payload once the main battle progression closes out, hitting for 50 damage roughly every 6 seconds while moving at speed 1.8. That payload-facing version shares the same identity and model as the Story boss but is tracked separately in the game's data as a payload-assault mechanic rather than a standard wave spawn.
Details
Where String Demon Appears
String Demon closes out Rose Kingdom Act 5 in Story mode as the zone's true final boss, coming after the four card-suited officers, and also headlines Rose Kingdom Expedition as both the fifth fight in its elite gauntlet and the enemy that assaults the defended payload once the main battle progression closes out.
Story Wave Behavior
String Demon's Story wave runs the Regen1, Reinforced, and Momentum modifiers. Regen1 lets it slowly regenerate health over time, Reinforced cuts all incoming damage by a flat 30%, and Momentum stacks a damage buff up to 50% the longer the fight drags on.
Like every Boss-type enemy, String Demon carries a hidden tag that adds a flat 20% health multiplier and a 30% speed penalty on top of its listed stats. Neither Rose Kingdom's Story wave nor its Expedition appearance carries the Immunity modifier, so incoming Stun and Rewind effects are capped at 10 stacks rather than fully blocked.
Expedition Payload Behavior
In Rose Kingdom Expedition, String Demon directly assaults the defended payload once the main battle progression ends, hitting for 50 damage roughly every 6 seconds while moving at speed 1.8. This payload-facing version shares the same identity and model as the Story boss but is tracked separately in the game's data as a payload-assault mechanic rather than a standard wave spawn.
How to Counter String Demon
Momentum stacking a damage buff up to 50% the longer the fight lasts makes a fast, high-burst clear noticeably more efficient than a slow attrition fight, both in the Story encounter and against the Expedition payload assault.
Reinforced's flat 30% damage reduction and Regen1's steady healing still apply throughout, so pairing burst timing with consistent sustained pressure covers both halves of the fight.
FAQ
Where do I fight String Demon?
String Demon closes out Rose Kingdom Act 5 in Story mode, and also appears as the final elite gauntlet fight and payload-assault boss in Rose Kingdom Expedition.
How do I counter String Demon's Momentum modifier?
Momentum stacks a damage buff on String Demon by up to 50% the longer the fight lasts, so a fast, high-burst clear is more efficient than dragging the fight out and letting the buff build.
Can I stun String Demon?
Yes, though it caps out. As a Boss-type enemy, incoming Stun and Rewind effects are capped at 10 stacks rather than fully blocked, since neither its Story wave nor its Expedition appearance carries the Immunity modifier.
Other enemies
Source-checked
Extracted from Anime Expeditions client data (enemies.json, enemy-types.json, enemy-modifiers.json, maps.json). updated · GuideDex staff. Report a correction.