The Greek god of Star Rail.

Ratio rivals Herta’s arrogance and Ruan Mei’s eccentricity.

As a member of the Intelligensia Guild, he has a low tolerance for ignorance.

Dr. Ratio can’t stop, won’t stop learning.

Now Playing:Honkai: Star Rail - Dr. Ratio Character Trailer | “Supreme Idiocy”

(It’s apparently to block out the idiots.)

Ratio is the first member of the Guild to appear as a playable character inHonkai: Star Rail.

He’s also the first limited-time 5-star character that HoYoverse has offered to its players.

Don’t bother with Baptism of Pure Thought if you have Cruising in the Stellar Sea.

Here’s a quick rundown of Dr.

Ratio’s abilities and his best Light Cones, Relics, and team comps.

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One of Dr. Ratio’s biggest quirks is his insistence on wearing a plaster mask.

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Ratio Character Trailer | “Supreme Idiocy”

Dr.

These traits make Dr.

An example of Dr. Ratio’s ideal set: Wastelander plus Inert Salsotto.

Ratio more of a team player than his personality would suggest.

His Ultimate triggers a follow-up attack whenever his teammates attack the same enemy.

Meanwhile, his Talent raises the chance of triggering a follow-up attack when Dr.

Dr. Ratio’s Ultimate is one of his many strengths.

Ratio uses his Skill.

Be sure to read the exact triggers below, though.

These are the descriptions of his abilities starting at Level 1.

Ratio abilities

Basic attack: Mind is Might

Dr.

Ratio deals Imaginary DMG equal to 50 percent of his attack to a single enemy.

Skill: Intellectual Midwifery

Dr.

Ratio deals Imaginary DMG equal to 75 percent of his attack to a single enemy.

Ultimate: Syllogistic Paradox

Syllogistic Paradox boasts high damage and triggers hard-hitting follow-up attacks.

This effect triggers his follow-up attack whenever allies attack the same enemy up to two times.

Talent: Cogito, Ergo Sum

When using his Skill, Dr.

The chance of a follow-up attack increases by 20 percent for each debuff the target has.

If you already have two character to apply debuffs, that can rise to 80 percent without Dr.

Ratio even applying one himself.

Ratio inflicts 15 percent SPD Reduction on any enemies within this dimension for two turns.

Don’t stand within the space or the enemy will attack you.

Prioritize leveling up Dr.

Ratio’s abilities in this order: Talent > Ultimate > Skill > Basic Attack.

Ascension Passives

Best Light Cone for Dr.

Ratio’s best Light Cone isBaptism of Pure Thought, a five-star Light Cone specifically tailored for his kit.

It even increases DMG and ignores the target’s DEF by 20 percent for two turns after Dr.

Ratio hits it with his Ultimate.

It’s a limited-time Light Cone that runs alongside Dr. Any of the other five-star Hunt Light Cones will also do a fine job.

These also depend on gacha, though.

The best free-to-play option is hands-down theCruising in the Stellar SeaLight Cone from Herta’s Shop.

Only Silence Remains is a gacha Light Cone you might already have from pulling on banners.

Return to Darkness comes from the Nameless Honor Battle Pass, which you’re able to buy.

(Again, I’d recommend Cruising in the Stellar Sea over that because it isfree.)

Ratio

If you’re able to, get a four-piece Wastelander of Banditry Desert set to boost Dr.

Ratio’s Imaginary DMG and increase Crit Rate against debuffed enemies.

He also gets a Crit DMG bonus against Imprisoned (the Imaginary character debuff) enemies.

It’s as if this set was built for him with how well it complements his kit.

You might not get an ideal four-piece set right away, though.

Ratio because of the 20 percent boost to follow-up attack damage.

Two-piece Musketeer of Wild Wheat with two-piece Wastelander also does well with its Imaginary DMG and ATK boost.

Musketeer is an older set that many players should have because of how early it becomes available.

The Ashblazing Grand Duke

Musketeer of Wild Wheat

As for Ornaments, Inert Salsotto stands out as Dr.

Ratio’s best option because it raises Crit Rate and follow-up attack DMG.

While raising the wearer’s Crit Rate above 50 percent might be difficult for other characters, Dr.

Ratio makes it easier because of the Crit Rate build into his Traces.

You’ll get at least 10 percent just from leveling him up.

The rest can easily add up through his Light Cone and Relics.

Ratio Relic stats

As a DPS, Dr.

Ratio benefits most from ATK, Crit DMG, and Crit Rate.

For his feet, go for SPD boots so that he can squeeze in as many turns as possible.

Choose an Imaginary DMG sphere and Energy Regeneration Rope for his Ornaments.

Ratio’s best teammates will complement his strengths.

However, he’s a perfectly capable attacker that could smoothly run with just 4-star and free-to-play characters.

Ratio, Topaz, Guinaifen, Lynx

Dr.

Ratio, Serval, Natasha, Kafka

Dr.

Ratio, Lynx, Tingyun, Welt

Dr.

Ratio, Natasha, Fire Trailblazer, Asta

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