Cocoro Nebasei

Cocoro Nebasei (Japanese: 根羽清ココロ), also written in Japanese name order as Nebasei Cocoro, is a Japanese corporate VTuber who is the official YouTuber of Rohto Pharmaceutical Co., Ltd. She is known as one of the early brand-affiliated VTubers. Her videos mix gameplay content with health and lifestyle tips connected to the company's products.

Profile

Item	Detail
Debut	June 8, 2018
Birthday (setting)	June 10
Age (setting)	25
Affiliation	Rohto Pharmaceutical Co., Ltd. (corporate VTuber)
Hair and eye color	Brown hair, blue eyes
Catchphrase	"Neba---!"
Character designer	fuzichoco
Language	Japanese

Career

Cocoro Nebasei was created by Rohto Pharmaceutical, a Japanese multinational pharmaceutical company. It was one of the first Japanese businesses to start its own VTuber, after the format was popularized by Kizuna AI. Her YouTube channel, "Cocoro Ch by Rohto Pharmaceutical" (Cocoro Ch by ロート製薬), was created on May 31, 2018, and she debuted on June 8, 2018. Her birthday setting of June 10 matches a date the company promotes on its own website, where she has a dedicated character page.

Coverage of brand-affiliated VTubers describes her as a long-running example of the trend. Her content supports the company's aim of promoting its growing product line to new groups of consumers. She has also performed in 3D, including at a 3D live concert. Over the years, her channel has built up a large library of videos.

Activities

Streaming style

Her content combines typical "Let's Play" gaming videos with videos on health and lifestyle. Past topics include tips for avoiding UV rays when going outside and tips on skin care. Through this mix, she presents the company's areas of expertise in an entertaining format rather than as direct advertising. Her channel description introduces her as Rohto Pharmaceutical's official YouTuber. It says she wants to make videos that help viewers feel even a little bit soothed, and that she hopes to be recognized someday. She opens with the greeting "Neba---!", a play on her surname.

Her official X account is linked from her YouTube channel and is used for announcements and promotion alongside her videos. Her content is generally light and comedic in tone.

Characteristics

Cocoro Nebasei is designed as a 25-year-old woman with short brown hair and blue eyes. Her character design was created by the illustrator fuzichoco. As a mascot-style corporate character, she represents the Rohto brand. Her persona is set up as a hardworking and earnest newcomer who wants to grow her channel and win recognition. Her name and greeting are built around the Japanese verb ending "-neba" ("must"), so her catchphrase doubles as a reminder that she "must do her best."