Mesmer Jr.
4★

Mesmer Jr.

Intellect 4★ Arcanist
About Mesmer Jr.

Mesmer Jr. is a 4★ Intellect Arcanist in Reverse: 1999. Below are the exact Insight materials needed to ascend them, plus other Intellect Arcanists to build alongside.

Data updated: 2026-07-11

Mesmer Jr. — Review & Analysis

Mesmer Jr.

Mesmer Jr is a 4-star Intellect controller-support: her Ultimate hits all enemies for Mental DMG and stacks [Paralysis], turning into Stun at 2 stacks — making her a pace-breaking control unit. Incantation II raises the team's Mental DEF and grants [Calm], while Incantation I dispels enemy buffs, so she leans toward control-focused sub-DPS plus team defense rather than raw damage.

Strengths
  • Her Ultimate combines AoE damage with [Paralysis] stacking into Stun, giving the team reliable hard control.
  • Incantation II boosts the whole team's Mental DEF (up to 20%) and grants [Calm] to cut incoming Mental DMG — strong cover against Mental-damage bosses.
  • Incantation I dispels enemy [Stat Boost][Status Buff], stripping troublesome buffs off tough targets.
Weaknesses
  • The Stun only triggers once [Paralysis] reaches 2 stacks, so her control comes with a delay and can't lock enemies on turn one.
  • As a 4-star Intellect unit her Afflatus stands outside the counter cycle, and she has low base stats, limiting her as a pure damage dealer.
Build Priority

Prioritize her Ultimate first to unlock Stun control sooner and benefit from the Shaping passive's damage multipliers, then Incantation II to thicken the team's defensive buff and [Calm]. Since she plays as control-support, pick a Mental ATK / damage Psychube when you want more AoE pressure, or a support-oriented (effect-duration / team survival) Psychube if she runs purely as a buffer.

Overview

Rarity
4★
Afflatus
Intellect
Birthday
September 20
Official Names
JA: メスメル・Jr.KO: 메스머 주니어ZH-TW: 小梅斯梅爾
Afflatus Matchups
↑ Strong against
No Afflatus advantage
↓ Weak to
No Afflatus advantage

Base Stats (max level)

Stats at Insight III, max level — from datamined values.
HP4,540
ATK926
Reality DEF416
Mental DEF500
Crit Rate11.6%
Crit DMG147.4%
Stats across Insight milestones
Base Stats (max level) Lv.1Lv.30Insight 1 · Lv.40Insight 2 · Lv.50
HP 1,1971,8163,0454,540
ATK 245371622926
Reality DEF 110167280416
Mental DEF 132201336500
Crit Rate 9.2%9.2%10.4%11.6%
Crit DMG 143.8%143.8%145.6%147.4%

Mesmer Jr. — Skills & Incantations

Full skill kit with values per upgrade tier.
Incantation I — Piercing Magnetic Current Incantation

“Insight II: 1-target attack. Deals 450% Mental DMG and dispels all 【Stats Up】 and 【Pos Status】 statuses from the target.”

Insight 0: 1-target attack. Deals 200% Mental DMG.
Insight I: 1-target attack. Deals 250% Mental DMG and dispels all Stats Up and Pos Status statuses from the target.
Insight II: 1-target attack. Deals 450% Mental DMG and dispels all Stats Up and Pos Status statuses from the target.
Incantation II — Restraint Grip Ring Incantation

“Insight II: Mass buff. Mental DEF +20% for all allies for 2 rounds and inflicts 2 stacks of 【Stabilize】 on them.”

Insight 0: Mass buff. Mental DEF +10% for all allies for 2 rounds and gives the caster 1 stack of Stabilize.
Insight I: Mass buff. Mental DEF +15% for all allies for 2 rounds and gives the caster 1 stack of Stabilize.
Insight II: Mass buff. Mental DEF +20% for all allies for 2 rounds and inflicts 2 stacks of Stabilize on them.
Ultimate Ritual — Artificial Somnambulism Therapy Ultimate

“Insight II: Mass attack. Deals 250% Mental DMG to all enemies. Inflicts 1 stack of 【Paralyze】 on the targets hit and 1 additional stack of 【Paralyze】 on the main target.”

Insight 0: Mass attack. Deals 200% Mental DMG to all enemies. Inflicts 1 stack of Paralyze on the targets hit and 1 additional stack of Paralyze on the main target.
Insight I: Mass attack. Deals 225% Mental DMG to all enemies. Inflicts 1 stack of Paralyze on the targets hit and 1 additional stack of Paralyze on the main target.
Insight II: Mass attack. Deals 250% Mental DMG to all enemies. Inflicts 1 stack of Paralyze on the targets hit and 1 additional stack of Paralyze on the main target.
Insight Legacy — Blocking Draught Incantation

“Insight II: Reality DEF and Mental DEF +10% when entering battle.”

Insight I: At the end of every 2 rounds, inflicts 1 stack of Stabilize on the ally with the lowest HP percentage.
Insight II: Reality DEF and Mental DEF +10% when entering battle.
Shaping Incantation

“Insight II: Reality DEF and Mental DEF +10% when entering battle.”

Insight I: At the end of every 2 rounds, inflicts 1 stack of Stabilize on the ally with the lowest HP percentage.
Insight II: Reality DEF and Mental DEF +10% when entering battle.

Skill Quotes

Official flavor quotes tied to each of Mesmer Jr.'s skill ranks, sourced directly from the game.

“This control measure is only for the hyper-excited.”

— Magnetic Current

“This control measure is only for the hyper-excited and those out of control.”

— Magnetic Current

“This control measure is only for the hyper-excited and those out of control, in most cases.”

— Magnetic Current

“A chain.”

— Inhibition Ring

“A chain for stabilizing one's mental status.”

— Inhibition Ring

“A chain for stabilizing one's mental status. You'd better hope it works.”

— Inhibition Ring

“She has never applied any extreme therapies, but she must have imagined what it would be like.”

— Artificial Somnambulism Therapy

Insight Materials

Exact materials to raise this Arcanist's Insight level.
Insight 1
Sharpodonty × 8,000
Page of Mineral Wealth · +39 other characters also need this × 2
Page of Starlit Ascent · +38 other characters also need this × 2
Shattered Bones · +68 other characters also need this × 2
Liquefied Terror · +96 other characters also need this × 2
Insight 2
Sharpodonty × 25,000
Scroll of Mineral Wealth · +39 other characters also need this × 4
Scroll of Starlit Ascent · +38 other characters also need this × 4
Rough Silver Ingot · +85 other characters also need this × 5
Salted Mandrake · +66 other characters also need this × 2

Resonance Materials

Materials to build out the Resonance tuning grid.
All 9 Resonance levels
Resonance 2
Moment of Dissonance · +128 other characters also need this × 3
Resonance 3
Moment of Dissonance · +128 other characters also need this × 3
Trembling Tooth · +59 other characters also need this × 2
Resonance 4
Moment of Dissonance · +128 other characters also need this × 3
Silver Ore · +66 other characters also need this × 2
Solidus · +128 other characters also need this × 1
Resonance 5
Brief Cacophony · +128 other characters also need this × 3
Milled Magnesia · +70 other characters also need this × 1
Esoteric Bones · +92 other characters also need this × 2
Resonance 6
Sharpodonty × 20,000
Brief Cacophony · +128 other characters also need this × 3
Clawed Pendulum · +84 other characters also need this × 1
Resonance 7
Brief Cacophony · +128 other characters also need this × 4
Biting Box · +126 other characters also need this × 2
Resonance 8
Brief Cacophony · +128 other characters also need this × 4
Salted Mandrake · +66 other characters also need this × 2
Rough Silver Ingot · +85 other characters also need this × 2
Resonance 9
Brief Cacophony · +128 other characters also need this × 5
Bifurcated Skeleton · +117 other characters also need this × 3
Milled Magnesia · +70 other characters also need this × 4
Resonance 10
Sinuous Howl · +45 other characters also need this × 1
Sonorous Knell · +128 other characters also need this × 3
Holy Silver · +121 other characters also need this × 4
Biting Box · +126 other characters also need this × 4

Recommended Psychubes

Psychubes recommended to equip on Mesmer Jr., based on community builds.

Where to next

More Intellect Arcanists

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