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Seven Knights Idle Adventure

Undercover Ruri

Support Type

Crusaders: Undercover

Legendary
March 20, 2025

Unlock reward : 250Rubies icon- Seven Knights Idle Adventure

Hero Undercover Ruri portrait - Seven Knights Idle Adventure

Skills

Range : 60CD : 0Atk speed : 136

Deals damage equal to 300% of Attack to the target.

Range : 60CD : 0Atk speed : 200

Deals Critical Hit Damage equal to 600% of Attack to the target. Grants the I'll Fire! buff to allies for 2 sec upon a successful attack. Also inflicts the Concentrated Attack debuff on the hit target for 2 sec.

I'll Fire!

Increases Bonus Damage Rate by 24%. When attacking a target with Bounty Hunter, increases final damage by 30%.

Concentrated Attack

All allies other than those who are Taunted will be forced to attack the target with the Concentrated Attack debuff. There can only be one Concentrated Attack target.

Range : 120CD : 10Atk speed : 119

Grants the Steady Aim buff to allies for 10 sec and deals damage equal to 4500% of Attack to the target. Inflicts a Bounty Hunter debuff for 10 sec upon a successful attack. When the caster is in battle, grants Strike Support to allies.

Steady Aim

Increases final HP by 30% Increases Critical Hit Rate Resist by 24% Recovers HP by 20% every 1 sec for 3 sec This effect cannot be removed with Buff Removal.

Bounty Hunter

Affected by Bounty Hunter. That's right! I'm the bounty hunter!

Strike Support

Tense, Paralysis Immunity

Stats

Stats at level 1
StatsValueStatsValue
HP448Attack80
Defense30Critical rate3.75%
Hit165Critical factor150%
Dodge165Attack speed136
Health regen13Move speed33
Critical rate resist0%Lethal rate0%
Reduction rate0%Extra damage rate0%
Vital point rate0%Lethal factor150%
Extra damage factor150%Vital point factor130%

By the time Elke returned to the Mystic Woods after her arduous journey, the Crusaders had endured great hardship from the Curse of Destruction. With Orly's aid, a new power awakened, but it was still nowhere near enough to keep up with Gaia's ever-growing chaos. The party decided to first investigate the rumors about the beings from another world. From the cat dark mage to the puppet sniper, the squirrel robot, the white-haired spearman, and the mysterious religious organization, each was more bizarre than the last. Their first mission was to infiltrate the religious organization. Espada would disguise herself as a bride, while Bolt, now self-aware, would take on the role of her bodyguard. With her newfound superhuman vision, Ruri would blend into the crowd as a guest, providing cover from a rooftop several blocks away. Do I... really have to do this? Espada's complexion was even paler than the wedding dress she held. In all her years, she had only worn clothes for battle, never for a ceremony. Who else?! Nia can't be the bride! As Espada picked up the dress and trudged out of headquarters, Ruri's suppressed laughter spilled out, and she started rummaging through the wardrobe. Hehe! What should I wear? Even as a guest, I'll need to outshine the bride!

Undercover Ruri Guide

Quick Overview
Tier S
Role Support
Best Modes
Chaos Ruins PvE
Investment Priority Very High
Verdict
Must pull
Strength

+30% HP, Concentrated Attack, healing

Weakness

No revive, targeted by High Lord Teo

Undercover Ruri is one of the most well-rounded support heroes in the non-awakened roster. She keeps the team alive with +30% final HP, burst healing, Tense and Paralysis immunity, while simultaneously applying Concentrated Attack — an essential debuff in Chaos Ruins — and dealing surprisingly respectable damage for a support. A hero that quietly does everything without demanding the spotlight.

Should You Use Undercover Ruri?

Yes — she is an essential support hero. Provides team survivability, Concentrated Attack for Chaos Ruins, and decent personal damage.

Strengths

Strong team survivability package — Steady Aim grants all allies +30% final HP, +24% Crit Rate Resist and 20% HP recovery per second for 3 sec on active, all undispellable. Combined with the permanent Tense and Paralysis immunity from Strike Support, she provides consistent protection that helps the team survive sustained damage and CC-heavy encounters.
Concentrated Attack — mandatory in Chaos Ruins — her critical hit attack applies Concentrated Attack on every hit (via her crit), forcing all allies to focus the marked target. In Chaos Ruins where multiple mobs spawn constantly, this is one of the most important debuffs in the mode.
Decent personal DPS for a support — her active skill deals 4500% Attack to a single target, which is a genuinely high multiplier for a support hero. She contributes more personal damage than most support picks, making her more efficient as a slot investment.
+30% final damage buff for allies — I'll Fire! increases allies' final damage by 30% when attacking a Bounty Hunter-marked target on every successful crit, adding consistent team damage amplification throughout the fight.
Excellent Overload counter — when paired with an Overload debuffer, Ruri's HP recovery every second directly offsets the self-damage, keeping the team healthy while benefiting from the massive damage boost.

Weaknesses

No revive — unlike Arang or Restia, Ruri has no built-in revive. Once she falls, she stays down, which limits her long-term survivability in extended fights.
Support Type — targeted by High Lord Teo — as a Support Type hero, she is automatically targeted by High Lord Teo's jump in PvP. Like Arang, this makes her vulnerable to being eliminated early in competitive play against Teo-heavy teams.
Healing window is short — the 20% HP recovery per second only lasts 3 sec per active activation. In very sustained fights, the healing may not be sufficient without additional heal sources.

Why Undercover Ruri Stands Out

She is one of the most well-rounded supports in the game — providing team HP buffs, healing, CC immunity, Concentrated Attack for Chaos Ruins, and respectable personal damage.

Best Game Modes

  • Chaos Ruins — essential — her Concentrated Attack application makes her one of the best picks for this mode. Combined with her team survivability buffs and personal damage, she is a standout choice here.
  • PvE End-game (Deep Nightmare, Nightmare, Hard Boss Challenge, Abyss Expedition) — her undispellable HP boost, consistent healing and team damage amplification make her a reliable support across all major PvE content.
  • PvP (Arena) — secondary team — a functional PvP support pick whose team HP boost, CC immunity and damage buffs add meaningful protection. Best used in second teams where her survivability toolkit strengthens a DPS-heavy composition that needs a support anchor.

Build & Optimization

Focus on skill cooldown reduction to maintain her buffs and healing uptime. For PvP, consider survivability potentials to keep her alive against High Lord Teo targeting.

Investment Advice

Early game
Top-tier investment — essential support
Mid game
Top-tier investment — essential support
Late game
Top-tier investment — essential support

FAQ

Is Undercover Ruri worth pulling?

Yes. She is an essential support hero with team HP buffs, healing, CC immunity, and Concentrated Attack for Chaos Ruins.

What makes Undercover Ruri unique?

She combines survivability (HP buff, healing, CC immunity), utility (Concentrated Attack), and damage in one support hero.

What is Undercover Ruri good for?

Chaos Ruins (essential), all PvE end-game content, and secondary PvP teams.

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