Dr. Ratio Profile, Skills, Traces and Eidolons

Introductions

Dr. Ratio is a 5★ character with the Imaginary element who follows the Path of The Hunt.
Member of the Intelligentsia Guild.
Eccentric temperament, sharp-tongued but with an elegant demeanor.
The face under the strange alabaster head sculpture is apparently unexpectedly handsome.

Skills

Basic ATK

Mind is Might

Single Target

Lv. 6

Energy gain: 20

Break: Main: 10.0

Deals Imaginary DMG equal to 100% of Dr. Ratio's ATK to a single target enemy.

Skill

Intellectual Midwifery

Single Target

Lv. 10

Energy gain: 30

Break: Main: 20.0

Deals Imaginary DMG equal to 150.0% of Dr. Ratio's ATK to a single target enemy.

Ultimate

Syllogistic Paradox

Single Target | 140 energy cost

Lv. 10

Energy gain: 5

Break: Main: 30.0

Deals Imaginary DMG equal to 240.0% of Dr. Ratio's ATK to a single target enemy and applies Wiseman's Folly. When Dr. Ratio's teammates attack a target afflicted with Wiseman's Folly, Dr. Ratio launches 1 instance of his Talent's Follow-up ATK against this target.
Wiseman's Folly can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.

Talent

Cogito, Ergo Sum

Single Target

Lv. 10

Energy gain: 5

Break: Main: 10.0

When using his Skill, Dr. Ratio has a 40.0% fixed chance of launching a Follow-up ATK against his target for 1 time, dealing Imaginary DMG equal to 270.0% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-up ATK increases by 20.0%. If the target enemy is defeated before the Follow-up ATK triggers, the Follow-up ATK will be directed at a single random enemy instead.

Technique

Mold of Idolatry

Debuff

Energy gain: -

After using Technique, creates a Special Dimension that Taunts nearby enemies, lasting for 10 second(s). After entering battle with enemies in this Special Dimension, there is a 100% base chance to reduce each single enemy target's SPD by 15.0% for 2 turn(s). Only 1 Dimension Effect created by allies can exist at the same time.

Major Traces

Summation

Major trace

When Dr. Ratio uses his Skill, for every debuff on the target, his CRIT Rate increases by 2.5% and CRIT DMG by 5.0%. This effect can stack up to 6 time(s).

Inference

Major trace

When Skill is used to attack an enemy target, there is a 100% base chance to reduce the attacked enemy target's Effect RES by 10.0% for 2 turn(s).

Deduction

Major trace

When dealing DMG to a target that has 3 or more debuff(s), for each debuff the target has, the DMG dealt by Dr. Ratio to this target increases by 10.0%, up to a maximum increase of 50.0%.

Minor Traces

ATK

+28.0%

CRIT Rate

+12.0%

DEF

+12.5%

Eidolons

Pride Comes Before a Fall

Eidolon 1

The maximum stackable count for the Trace "Summation" increases by 4. When a battle begins, immediately obtains 4 stacks of Summation. Needs to unlock Summation first.

The Divine Is in the Details

Eidolon 2

When his Talent's Follow-up ATK hits a target, for every debuff the target has, deals Imaginary Additional DMG equal to 20.0% of Dr. Ratio's ATK. This effect can be triggered for a maximum of 4 time(s) during each Follow-up ATK.

Know Thyself

Eidolon 3

Ultimate Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Ignorance Is Blight

Eidolon 4

When triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.

Sic Itur Ad Astra

Eidolon 5

Skill Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

Vincit Omnia Veritas

Eidolon 6

Additionally increases the trigger count for "Wiseman's Folly" by 1. The DMG dealt by the Talent's Follow-up ATK increases by 50.0%.

Stats and Ascension Materials

Lv. 1

Base Stats

143

ATK

106

DEF

SPD

103

Ascension Materials

Credits

308000

Thief's Instinct

Usurper's Scheme

Suppressing Edict

Conqueror's Will

Dr. Ratio Voice Actors

Jordan Paul Haro

Takeuchi Shunsuke

Sang Yuze

Lee Donghoon

Shikhu

Staff Author

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This guide has been written by Shikhu (Discord - Shikhu). A long-time Honkai Star Rail player since launch experiencing everything the game has to offer from building his favourite characters to clearing MoC, PF and AS on the regular.