Diamond Officer
Diamond Officer closes out Act 3 of Rose Kingdom's Story campaign, the midpoint stop in a set of four officer-titled bosses spread across the zone: Heart Officer at Act 1, Club Officer at Act 2, Diamond Officer at Act 3, and Spade Officer at Act 4, before String Demon closes out Act 5 as the zone's true final boss.
Its wave runs the same base modifier pair seen at Heart Officer's Act 1 fight, Regen1 for slow health regeneration and Reinforced for a flat 30% damage reduction, without an additional third modifier layered on top the way Club Officer and Spade Officer each have. That makes Diamond Officer's fight a straightforward damage-reduction check rather than one that also demands add management or a transformation phase.
Like every Boss-type enemy, Diamond Officer carries a hidden tag adding a flat 20% health multiplier and a 30% speed penalty on top of its listed stats, moving at the Boss tier's baseline speed multiplier of 1.68 and modeled at 0.8x scale. Incoming Stun and Rewind effects cap out at 10 stacks rather than being fully blocked, since Rose Kingdom's wave list does not carry the Immunity modifier.
Details
Where Diamond Officer Appears
Diamond Officer closes out Rose Kingdom Act 3 in Story mode, the midpoint stop in the zone's four-officer lineup: Heart Officer at Act 1, Club Officer at Act 2, Diamond Officer here at Act 3, and Spade Officer at Act 4, before String Demon closes out Act 5 as Rose Kingdom's true final boss.
Rose Kingdom Act 3 also runs in Infinite, Expedition, and Mastery modes alongside the core Story campaign, so Diamond Officer can be encountered outside of Story progression as well.
Combat Behavior
Diamond Officer's wave runs only the base Regen1 and Reinforced modifier pair, the same combination Heart Officer's Act 1 fight uses, without a third modifier layered on top the way Club Officer's Summoner or Spade Officer's Transformer tags add extra complexity to those fights.
Like every Boss-type enemy, Diamond Officer carries a hidden tag adding a flat 20% health multiplier and a 30% speed penalty, moves at the Boss tier's baseline speed multiplier of 1.68x, and is modeled at 0.8x scale. Rose Kingdom's wave list does not carry the Immunity modifier, so incoming Stun and Rewind effects are capped at 10 stacks instead of blocked outright.
How to Counter Diamond Officer
Reinforced's flat 30% damage reduction blunts big hits almost as effectively as sustained ones, while Regen1 slowly heals Diamond Officer back up between hits. Steady, consistent damage output beats relying on a single burst window.
Because it carries no additional third modifier, Diamond Officer plays out as a more straightforward damage-reduction check than Club Officer or Spade Officer, despite coming later in Rose Kingdom's act order.
FAQ
Where do I fight Diamond Officer?
Diamond Officer closes out Rose Kingdom Act 3 in Story mode, the third of the zone's five acts.
Is Diamond Officer easier than Club Officer?
Its wave carries only the base Regen1 and Reinforced modifiers with no additional third modifier, unlike Club Officer's added Summoner tag or Spade Officer's added Transformer tag, making it comparatively more straightforward despite coming later in the act order.
What strategy works best against Diamond Officer?
Steady, sustained damage over a single burst attempt, since its Reinforced modifier cuts incoming damage by 30% flat and Regen1 slowly heals it back up between hits, the same core check as Heart Officer's fight.
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.