Professor M is a non-limited Moon attribute Ranger introduced during the A Study in Gray event in Studiobside's turn-based RPG StarSavior. She functions as an offensive Sub-DPS and follow-up attack enabler who pulls your highest-attack ally into guaranteed dual attacks while continuously advancing her own turn order.
Players can obtain up to 40 event summon tickets through daily login rewards, making it best to spend those free pulls before deciding to commit Stellagems. Because she is a non-limited unit and the limited defender Eternal Promise: Carmen reruns in the same window, most players should prioritize Carmen first and only pull Professor M if their core defensive roster is already established.
Skill Breakdown and Action Gauge Mechanics
Professor M relies on cycling turns rapidly through built-in Action Gauge buffs while stacking Chill to trigger free follow-up attacks. Her passive is her primary engine, turning your strongest DPS into a frequent attacker.
- Passive – Research Subject: After using her basic skill, Professor M applies Sample Behavior Analysis to the ally with the highest Attack for 1 turn and triggers a dual attack with that ally. Sample Behavior Analysis increases the ally's damage dealt by 10%. When an ally other than Professor M attacks an enemy, Professor M fills her Action Gauge by 4% and has a 50% chance to gain 1 stack of Chill (scaling up to 100% with Limit Breaks). If the attacking ally currently has Sample Behavior Analysis, Professor M gains an additional 4% Action Gauge (8% total) and 1 guaranteed extra Chill stack. Applying a new instance refreshes the buff and overwrites the previous one.
- Basic Skill – Black or White: Swings her briefcase to attack an enemy and grants herself 1 stack of Chill. When executing a Nova Burst, the attack deals 1 additional toughness break damage and pushes Professor M's Action Gauge forward by an extra 20%.
- Special Skill – Evil Begets Evil: A trigger skill with no cooldown. When Professor M reaches the maximum cap of 5 Chill stacks, an ally's attack triggers Professor M to follow up with Evil Begets Evil. This attack consumes all 5 Chill stacks, advances her Action Gauge by 15% (at max skill level), and increases her damage dealt by 30% if the target enemy's toughness is broken. The strike prioritizes the enemy she attacked most recently, though it does not generate Nova force.
- Ultimate – The Magic Bullet: Attacks a single enemy with a four-turn base cooldown once upgraded. The skill grants Professor M 3 stacks of Chill immediately, pushes her Action Gauge forward by 50%, and has a 75% to 100% chance to inflict Target Engrave for 2 turns. Target Engrave increases the damage taken from Special Skills by 20%.
| Skill Name | Skill Type | Cooldown | Primary Effect | Action Gauge Advance |
|---|---|---|---|---|
| Black or White | Basic Skill | None | Deals damage, grants 1 Chill stack (+1 toughness break on Nova Burst) | +20% on Nova Burst |
| Evil Begets Evil | Special Skill (Trigger) | None | Consumes 5 Chill; +30% damage on toughness-broken enemies | +5% to +15% on attack |
| The Magic Bullet | Ultimate | 4 Turns (Max) | Deals damage, grants 3 Chill, inflicts Target Engrave (+20% Special DMG taken) | +50% on cast |
| Research Subject | Passive | None | Grants 10% DMG buff to highest ATK ally; triggers dual attack | +4% to +8% per ally turn |
Breakthrough and Duplicate Investment Value
Professor M does not require duplicate copies to fulfill her core role. Her guaranteed dual attack trigger on Black or White functions at zero Limit Breaks (Base 0 LB) as long as she is not under crowd control like stun.
- Base (0 LB): Fully functional. The dual attack trigger chance is 100%. Her passive Chill generation on general ally attacks sits at a base 50% chance.
- 2 LB: Raises the Chill generation chance from non-buffed ally attacks to 75%.
- 3 LB (Max): Guarantees a 100% Chill generation rate on all ally attacks, eliminating RNG from her special skill trigger rotation.
For F2P and low-spending players, leaving Professor M at Base is completely viable. The Limit Break upgrades purely smooth out consistency in extended boss encounters rather than locking away core mechanics.
Signature Arcana: Hedonist's Diversion
Hedonist's Diversion is an Endurance-class Arcana tailored to Rangers. Its key potential trait, Agile Stance, advances the equipped Ranger's Action Gauge by 20% after they land a single-target Special Skill. This effect can trigger once per turn.
When equipped on Professor M alongside her Ultimate (+50% Action Gauge) and Special Skill proc (+15% Action Gauge), her total Action Gauge boost can reach up to 85% in a single sequence. However, this Arcana is highly niche across the wider roster because it requires a single-target Special Skill, excluding units with AoE triggers like Bell Rhys. Pulling specifically for this Arcana is unnecessary for most accounts; running alternative options like Omega's Imaginary Pioneer for Special Skill damage, Endurance Lyn for speed, or utilizing the Arcana Borrow system is sufficient.
Recommended Builds and Equipment Stats
Professor M scales best with offensive damage stats while prioritizing enough speed to cycle her skills smoothly.
- Recommended Gear Sets: Insight + Valor (Critical Rate and Attack), Insight + Effect Hit, or Royal Guard Great Sword (Critical Damage) paired with Power. If you run Bell's Arcana, a Destruction set is also viable.
- Necklace Main Stat: Speed.
- Ring Main Stat: Attack Percentage (ATK%).
- Substat Priority: Speed > Critical Rate > Critical Damage > Attack % > Effect Hit. Aim to push Critical Rate close to 100% (or roughly 75% if paired with Bell's Arcana), followed by Critical Damage and Speed past 190–200.
- Talisman Combination: AX5 for reliable critical rate consistency, with DX6 as an alternative for pure speed and gauge scaling.
- Skill Level Priority: A cost-efficient upgrade milestone is 3/6/6 (Basic/Special/Ultimate). High-investment players can run 7/8/8, with the Special Skill prioritized toward Level 10 to maximize gauge returns.
Best Team Compositions
Professor M performs at her best in PvE setups where a single, heavy-hitting primary attacker can abuse repeated turns, or alongside units that break boss toughness bars rapidly.
| Team Role | Recommended Saviors | Synergy Notes |
|---|---|---|
| Primary DPS | Amora, Flawless Blue Rose: Claire, Tyria, Cristelle | Amora and Claire capitalize heavily on the 10% damage buff and free basic-attack actions from dual attacks. |
| Special Skill DPS | Summer Smile, Faye | Summer Smile and Faye gain massive value from the 20% extra Special Skill damage granted by Target Engrave. |
| Defender / Tank | Emilly, Hilde | Emilly provides extra turns, shields, and attack buffs, keeping Professor M alive despite her fragile base defenses. |
| Healer / Support | Eternal Promise: Carmen (Wedding Carmen), Clarissa | Carmen keeps the team sustained while ensuring continuous offensive flow. Clarissa offers accessible multi-hit triggers. |
One critical anti-synergy to keep in mind involves Waltz of Starlight: Asherah. Because the game restricts dual attacks to activating once per turn, Waltz of Starlight: Asherah's dual attack cannot proc during Professor M's dual attack action, reducing overall efficiency when paired together.
Banner Pull Verdict: Should You Summon Professor M?
Professor M ranks in the S-Tier for PvE as a specialized Sub-DPS and enabler. However, your decision to spend Stellagems should depend on your current team needs and banner schedules:
- Spend Free Login Tickets First: You can claim 40 Observation Tickets through the event login campaign. Use all of these before spending premium currency.
- Skip or Hold if You Lack Carmen: Eternal Promise: Carmen is a top-tier limited Moon Defender whose damage absorption and team protection form the core of high-end PvE and PvP teams. Carmen's banner takes absolute priority over Professor M.
- Pull at Base if You Have Strong Single-Target DPS: If you already own Carmen and core defenders, pulling a single base copy of Professor M significantly enhances continuous boss damage in gear-farming stages and Operations.
- Skip if You Are Saving for Gwen: Professor M will eventually join standard banners, whereas upcoming banners like Gwen or limited reruns may demand full currency reserves.
