Arknights' crossover event with Delicious in Dungeon brings two unique operators—Laios and Marcille—to the tactical gacha game. Mastering their abilities, combat styles, and optimal deployment strategies will elevate your gameplay to new heights.
These limited-time characters are exclusively available through a special collaboration banner, requiring players to navigate the gacha system for a chance to obtain them. Once acquired, you'll want to maximize their potential—this guide provides everything you need to know.
Laios: The Tactical Melee Specialist
As a 5-star Dreadnought Guard, Laios specializes in single-target elimination, but his true strength lies in his battlefield awareness. His kit excels when players strategically counter enemy types and capitalize on spawn patterns. Unlike plug-and-play operators, Laios requires careful positioning and foresight to unleash his full potential.

Abilities and Strategic Applications
At Elite 2, Marcille gains Reliable Companion—granting 25 initial SP while providing team-wide ATK SPD and DEF buffs when deploying four or more Laios's Party members. This transforms her into both a damage dealer and support unit.
Her three skills offer distinct combat applications centered around SP management:
A Scholar's Focus: Converts SP into burst damage, or switches to healing allies when enemies are absent. Excellent for hybrid roles.
Familiar Summon: Deploys a combat companion that enhances basic attacks with slowing effects. Reactivating empowers it further with increased range and stun capabilities—perfect for zone control.
Arcane Detonation: This high-cost ability unleashes massive AoE damage with stunning effects. Extended channeling transforms it into a multi-hit nuke capable of wiping enemy waves.
Marcille's gameplay revolves around careful timing—deploy her during critical moments to unleash skills, then retreat to regenerate SP. This rhythm pairs exceptionally well with other SP-dependent operators or delay tactics.
Optimization and Team Composition
Marcille reaches peak performance at Elite 2, where her mana scaling and team buffs become active. While Familiar Summon offers the most versatility across different stages, Arcane Detonation shines in high-density scenarios.
Progression Recommendations:
Priority Promotion: Elite 2 for enhanced SP mechanics
Skill Priority: Familiar Summon for utility; Arcane Detonation for burst scenarios
Optimal Potentials: ATK boosts and redeployment cooldowns
She synergizes particularly well with operators that provide protection during casting or SP acceleration. While designed to work with Laios and crossover units, she also complements traditional caster teams requiring both firepower and crowd control.
Laios and Marcille introduce innovative gameplay dynamics to Arknights. Laios challenges players with precise tactical placement, while Marcille demands thoughtful resource management for explosive results. Together, they form a versatile duo capable of handling both single targets and swarm situations.
For players experimenting with Laios's Party compositions, both operators offer exceptional synergy. To experience their full potential, we recommend playing Arknights on PC via BlueStacks—enjoy superior controls, enhanced visibility, and uninterrupted gameplay for executing flawless strategies.