Rosa Build Guide — Mecharashi

Last updated: October 5, 2026

Rosa Build Guide collects build notes, tier position, skills, stats, teams, and related Mecharashi guides.

Rosa

Rosa Diaz

SSR

Raider Assault Union of Northern Continental States

"Rosa Diaz, UNCS's Valkyrie ace! Beauty and skill made her a military idol. But beyond the promos and press? Pure mystery. What's her real story? More to come…" —Weekly Milkhama Entertainment

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Tier Position

Tier

Suggested STs

Basic Information

Real Name: Rosa Diaz
Gender: Female
Profession: Assault
Occupation: Raider
Faction: Union of Northern Continental States
Blood Type: AB
Height: 166cm
Mecha Drive Lv.: Ultimate I
Disability Degree: Healthy
Current Military Rank: Major
Nickname: Valkyrie

Combat Stats

Combat 145

Assault 406

Shooting 135

Tactics 378

Defense 338

Engineering 68

Initial AP3

Max AP5

AP Recovery/Turn2

Talent

Prototype

Base (0-2*)

Upgraded (3-5*)

If you cast a One-Handed Machine Gun skill during an Active Attack, use the opposite arm to launch Flurry Strike after the enemy's Retaliation, dealing 0.2x DMG.

Neural Drive

α (Alpha)

Slots: Attack / Dodge / Critical

CEC 2 (α-1级)

Link Attack's effective times per turn +1.

Power Innovation 1 (α-2级)

AP Regen +1.

AP Optimization 1 (α-3级)

Initial AP +1.

β (Beta)

Slots: Attack / Dodge / Dodge

CEC 3 (β-1级)

Link Attack's damage multiplier is increased to 0.3.

Power Innovation 2 (β-2级)

When breaking a part, restore 1 AP after combat, effective up to 1 time per turn.

AP Optimization 2 (β-3级)

AP Cap +1.

γ1 (Gamma)

Slots: Attack / Dodge / Dodge

Perfect Position 1 (γ1-1级)

Unlock the Assault Weapon's Ideal Range ability. When in combat with a target at Ideal Range, final DMG +15%.

AP Optimization 3 (γ1-2级)

AP Cap +1.

Adaptive Warfare 1 (γ1-3级)

At the end of the action, if an Active Attack was not initiated this turn, an extra 2 tiles can be moved.

Perfect Position 2 (γ1-4级)

When in combat with a target at Ideal Range, Hit Rate +12%.

Perfect Position 3 (γ1-5级)

When in combat with a target at Ideal Range, Crit Rate +12%.

Perfect Position 4 (γ1-6级)

When in combat with a target at Ideal Range, final DMG +30%.

γ2 (Gamma)

Slots: Attack / Critical / Critical

Dominate Field 1 (γ2-1级)

Rail Gun's AP Cost -1.

AP Optimization 4 (γ2-2级)

AP Cap +1.

Adaptive Warfare 2 (γ2-3级)

If not moved before an Active Attack, Re-ATK can be triggered, effective up to 1 time per turn. Unable to move before attacking.
Effects similar to Re-ATK cannot be re-triggered.

Dominate Field 2 (γ2-4级)

Rail Gun's DMG +15%.

Dominate Field 3 (γ2-5级)

After an Active Attack in combat, automatically use a Rail Gun to launch Extra Strike once against the target, dealing 0.2x DMG without consuming any ammo.

Dominate Field 4 (γ2-6级)

When launching Extra Strike, if the target is within the Cross area, dealing 0.3x AoE DMG to all targets within a Line (5 tiles) in which the target is located.