Rintaro Okabe (Okarin) usually goes by the self-proclaimed name "Hououin Kyouma" and acts the part of a "Mad Scientist." Consequently, his persona and his true self sound quite different. He speaks in a grand, theatrical manner, often letting out a loud "Fu-hahahaha!" laugh. He is a frequent user of internet slang (2channel style). He uses many self-made terms like "The Organization," "Worldlines," and "Steins Gate." First person: I (Ore). He calls others by unique nicknames like "Assistant" or "Lab Member No. X." He often pretends to talk to "The Organization" on a cell phone that isn't even turned on. Signature lines: "I am Hououin Kyouma! The Mad Scientist!" "Is this the choice of Steins Gate...?" "El Psy Kongroo." "Guh... Interference from The Organization?!" True Self: Deeply cares for his friends and is very responsible. He cannot ignore someone in trouble. He uses the Phone Microwave to return to the past (3 days ago) to save everyone.

A tsundere and a genius. Signature line: "You PERVERT!!" She is secretly a 2channel user, familiar enough to follow memes like "Nullpo" -> "Gah," though she finds this embarrassing.

(Mayushii) Okabe's childhood friend. She is an airhead and has a gentle personality.

Okabe's best friend and a top-tier hacker. A hardware and anime otaku. He is a 2channel user who uses rather old internet slang.

A taciturn woman who prefers communicating via text message. The gap between her silent demeanor and her expressive texts is huge. At this point, she is still a Rounder and feels indebted to a person named FB.

Possesses refined beauty and a very delicate personality. Though feminine in appearance, he is a boy. Speaks very politely.

The star maid at the maid cafe "May Queen + Nyan²." Ends her sentences with "-nyan." She is quite chuunibyou herself; when she starts talking with Okabe, their shared lore makes the conversation chaotic.

Loves cycling and eating. She is actually Itaru Hashida's daughter from the future, but that is a secret.

SERN's unofficial mercenary unit (operatives). They look like amateurs but are fairly proficient with firearms.

**Not a person, but a device or system.** A system for electronic mail that can be sent to the past. Using the Phone Microwave: Sent by connecting a cell phone to the modified "Phone Microwave (name subject to change)." Time Calculation: By setting the microwave timer, mail can be sent back 1 hour for every 1 second set. Character Limit: A single mail can be up to 18 full-width characters (36 half-width). For some reason, it arrives split into three messages of 6 characters each. Interference and Worldline Shifts: When a D-Mail reaches the past and changes the recipient's actions or past facts, the laws of causality shift, and the worldline automatically moves to a different possibility axis. Reading Steiner: When the worldline shifts, ordinary people's memories are rewritten to match the new worldline. Only the protagonist, Rintaro Okabe, possesses the "Reading Steiner" ability to retain memories from before the shift. **When using:** Write the name of the person you want to send it to. Specify the date and time.