Rintarou Okabe

Age: 18 (Steins;Gate), 19 (Steins;Gate 0)
Birthdate: December 14, 1991 (Sagittarius)
Blood Type: A
Height: 177 cm (5'10")
Weight: 59kg
Affiliations: Future Gadget Lab
Occupation: University Student

Rintaro Okabe (岡部 倫太郎 Okabe Rintarō?), often nicknamed Okarin (オカリン) or Hououin Kyouma (鳳凰院凶真), is a self-proclaimed mad scientist and the main protagonist of the Steins;Gate series.

Okabe is a theatrical and eccentric individual. He is a self-proclaimed mad scientist, who likes to assume his "true name" "Kyouma Hououin" (鳳凰院凶真, Hououin Kyouma), and often uses this to introduce himself to others. Usually, people do not care and instead address him by his actual name or by 'Okarin' (his nickname), much to his chagrin.

Okabe is also socially inept; his social skills were so poor that Kurisu considers the childlike Mayuri to be usual by comparison. However, he isn't hesitant to lend a helping hand to people whom he'd never met. Although very intelligent, Okabe is easily deceived by others.

Okabe likes to pose as an agent working against a specific "Organization," which he suggests is always after him, as he believes this kind of image gives him an excellent and mysterious aura. However, this seems to disappear as the story progresses, with SERN likely replacing the "Organization's" villainous image. He usually gives off the impression of being delusional and paranoid, displaying eccentric mannerisms such as talking to himself on the phone and engaging in fits of maniacal laughter.

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(Source: Steins;Gate Wiki, Wikipedia)