dr. ratio (honkai: star rail)

DrRatio
Dr.レイシオ
真理医生
ratiorine

Playable character in Honkai: Star Rail. Voiced by Takeuchi Shunsuke in Japanese.

He is portrayed with short blue hair and yellow eyes. His default outfit is Greco-Roman in style and comprises a black shirt top, white tunic with the Intelligentsia Guild's badge on the left breast side, blue pants, and golden sandals. Often carrying his signature book.

Costumes

His Chinese name 真理医生 can be translated as Dr. Reason. Much like "Imbibitor Lunae", Dr. Ratio's name is also taken from Latin, with "Ratio" meaning "Reason".

In some languages of the game, his name is Dr. Truth instead, which is an acceptable translation though "Truth" is generally shown as 真相 and not as 真理 which is what they use for his name. According to early leaks, his name was originally going to be "Doctor of Truth".

His full name is Veritas Ratio, which is Latin for Truth Reason.

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"The most annoying thing about idiocy is that you can't explain it to an idiot."

A candid and self-centered Intelligentsia Guild member, who often conceals his appearance with a strange plaster sculpture. He demonstrated unparalleled intelligence and talent since his youth, but now refers to himself as a "Mundanite."

He firmly believes that intellect and creativity are not confined to geniuses. He seeks to distribute knowledge to the entire universe to cure the persistent disease named ignorance.

The following tags implicate this tag: dr._ratio_(academia)_(honkai:_star_rail), dr._ratio_(final_victor)_(honkai:_star_rail), and dr._ratio_(star_rail_live_2025)_(honkai:_star_rail) (learn more).