Sumeragi Reo

Sumeragi Reo (Japanese: 皇れお) is a male Japanese VTuber affiliated with NIJISANJI. He debuted in September 2025 as a member of the four-person unit Splare, and is known for his confident, self-proclaimed "strongest, genius, handsome" idol persona.

Profile

Item	Detail
Debut	September 19, 2025
Birthday	July 2
Age (character)	17
Height	172 cm
Agency	NIJISANJI
Generation or unit	Splare, with Hanakago Tsubasa, Shinomiya Yuno and Shirose Isumi
Oshi mark	Crown and cherry blossom emoji
Stream tag	#すとれおむ
Fan-art tag	#す絵らぎ
Character designer	TAKUMI

Career

Sumeragi Reo was introduced by NIJISANJI as part of its 2025 debut wave. He debuted on September 19, 2025, as a member of Splare, a unit made up of four students from the fictional Stars Academy: Hanakago Tsubasa, Shinomiya Yuno, Shirose Isumi and Reo himself. In his official profile, he is a second-year student at the academy and the 17-year-old leader of Splare, who thinks he is good at bringing everyone together, though the profile adds that this is only what he believes.

His first stream carried a title that translates roughly as "Strongest, Genius, Handsome, and therefore an Idol!!", which set out his character's confident idol image from the start. On his debut day, the official NIJISANJI store released Welcome Goods and a Welcome Voice for him, along with a complete Splare Welcome Voice set. In November 2025 he took part in the company's Dating Sim Parody Voice release as part of Group B, which was sold from November 14 to November 30, 2025 (JST).

Activities

Streaming style

Reo streams on YouTube in Japanese, mostly free talk and gaming. His listed favourite game genre is sandbox titles such as Minecraft and Animal Crossing. He uses separate hashtags for live streams, fan art, thumbnails and egosurfing, which is common practice among NIJISANJI talents. His channel rules ask viewers not to post comments that make others uncomfortable, such as verbal abuse. They also ask viewers not to mention other streamers in his chat, or bring up his name on other streamers' broadcasts.

Music and works

Welcome Goods and Voice (NIJISANJI official store, released September 19, 2025)
Splare Welcome Voice complete set (NIJISANJI official store, 2025)
Dating Sim Parody Voice, Group B (NIJISANJI official store, November 2025)

Characteristics

Reo has pink hair with bangs that partly cover his forehead, longer strands framing his face, and purple eyes. His outfit is a light blue jacket with white sleeves and light blue plaid accents, worn over a dark turtleneck and a vest. It also includes a pink strap, a silver chain on his left shoulder, white trousers with a black belt, a pale pink ribbon at the hip, and white loafers with silver buckles. His main colour is a soft pink (#EEB1CC) and his secondary colour is a light aqua (#9BF4E8).

In his character setting, he is in Class A of the second year at Stars Academy and belongs to the dance club. His listed likes are plushies, beetles, singing, dancing and his unit Splare. His favourite foods are meat, sweets, wasabi and cream taiyaki.