What is Riamu Yumemi?

Riamu Yumemi is a character from the mobile game THE iDOLM@STER: Cinderella Girls. She's an idol with a Menhera aesthetic and poor self-esteem who became popular as a meme due to her chaotic, relatable personality[2].

What does Riamu Yumemi mean?

As a meme, Riamu represents the "depression idol" archetype. Fans use her images and quotes to express feelings of emotional chaos, low self-esteem, and self-aware humor[2].

How do you use Riamu Yumemi?

Her in-game expressions and fan art are used as reaction images for relatable emotional moments, or in posts that set up a positive introduction before revealing something controversial she's said[2].

Is Riamu Yumemi still popular?

Riamu saw peak meme activity around early 2020 during the "loli" dialogue controversy. She still circulates in iDOLM@STER fan communities and among anime meme accounts[2].

Why was Riamu Yumemi controversial?

A February 2020 game update included dialogue where Riamu called the character Yukimi Sajo a "loli," sparking debate among fans about what's acceptable even for a deliberately provocative character[2].

What is "Depression Riamu"?

"Depression Riamu" is a fan nickname that captures her appeal as a self-deprecating, emotionally vulnerable idol who feels more like an internet shitpost than a polished anime character[2].

What is the Menhera subculture?

Menhera is a Japanese internet aesthetic and subculture associated with mental health themes, mixing cute visuals with open discussions of emotional struggles. Riamu is written as a follower of this subculture[2].

Riamu Yumemi

Q: Where did Riamu Yumemi come from?

She was added to Cinderella Girls in 2019 as part of the game's 7th anniversary update[2].

2019Character meme / reaction imagesemi-active

Published July 28, 2026

Also known as: Depression Riamu

Riamu Yumemi is a fictional character from the mobile game THE iDOLM@STER: Cinderella Girls who became an online meme after her debut in 2019. Known for her poor self-esteem, Menhera aesthetic, and chaotic personality, she quickly earned the nickname "Depression Riamu" and was embraced by fan communities as a relatable, shitpost-friendly idol. A February 2020 controversy over in-game dialogue where she called another character a "loli" pushed her further into meme territory.

Overview

Riamu Yumemi, a playable idol character from THE iDOLM@STER: Cinderella Girls, a popular Japanese mobile rhythm and idol-raising game. She's depicted as a follower of the Menhera subculture, a Japanese internet aesthetic associated with mental health struggles and emotional vulnerability2. On top of being an idol herself, Riamu is written as an idol otaku, someone who obsessively follows other idols while battling deep-seated self-esteem issues2.

Her personality hit a nerve with online communities almost immediately. Fans latched onto her self-deprecating attitude and unpredictable behavior, turning screenshots and art of her into reaction images and memes. The character's design and writing read like someone who already lived on the internet, which made her natural meme material.

Origin & Background

Platform

THE iDOLM@STER: Cinderella Girls (mobile game), Twitter (meme spread)

Creator

Bandai Namco / Cygames

Date

2019

Riamu was introduced to Cinderella Girls in 2019 as part of the game's 7th anniversary celebration2. Her character stood out from the roster thanks to her deliberately messy, emotionally volatile personality. Where most idol game characters lean optimistic and aspirational, Riamu was written as anxious, attention-seeking, and painfully self-aware. Fans on Japanese and English-speaking Twitter picked up on this contrast fast, sharing screenshots of her dialogue and creating fan art that leaned into her depressive qualities.

The nickname "Depression Riamu" caught on as shorthand for her appeal. One widely shared take described her as "a depressed idol that exists as the living embodiment of a 4chan shitpost"2.

How It Spread

Through late 2019 and into early 2020, Riamu memes circulated steadily through iDOLM@STER fan communities on Twitter and imageboards. Her popularity spiked in February 2020 when a game update added story dialogue in which Riamu refers to the character Yukimi Sajo as a "loli"2. The line set off a wave of debate among iDOLM@STER fans about the character's boundaries.

On February 2nd, 2020, Twitter user @PastelChum posted: "The whole internet loves Depression Riamu, a depressed idol that exists as the living embodiment of a 4chan shitpost! *5 seconds later* We regret to inform you the idol said 'loli is justice.'" The tweet picked up more than 280 likes within a week2. Around the same time, @CINDERELLAGlRLS pointed out that the "loli" line was far from the only controversial thing Riamu had done in-game, noting fans had "turned a blind eye to like. the 1838383 things she's done that idoltwt would cancel someone for." That post got over 200 likes in under a week2.

Not everyone saw a problem. Twitter user @Dauragon posted a defense arguing that offending people was essentially the whole point of the character. That take received over 760 likes and 195 retweets within the same week2.

The controversy, while short-lived, widened Riamu's visibility beyond the core iDOLM@STER fanbase. People who had never played Cinderella Girls encountered her through the Twitter discourse and found her meme-ready personality appealing on its own terms.

Frequently Asked Questions

References (2)

1
Hare Hare Yukaiencyclopedia
2
Riamu Yumemi - Know Your Memeencyclopedia