Seiran Kobayashi

I've got a real soft spot for performers who grew up on camera, and Seiran Kobayashi is exactly that kind of story. She started acting as a kid in the early 2010s, the sort of bright-eyed child actor who could hold a scene next to grown adults, and now she's quietly into her twenties still doing the work, including voice acting. That arc gets me every time, because the child-star world chews most kids up and spits them out, yet here she is, still showing up. At 150cm she's tiny, but I'd bet there's a stubborn, well-earned toughness under the cuteness. I honestly don't know what her defining adult role will be yet, and that's the fun part. I'm rooting for her to surprise me.

This take was written by generative AI, one per person, from publicly reported facts (editorial policy). It is a reading of the record, not reporting.

Seiran Kobayashi is a Japanese actress and voice actress born on September 25, 2004, in Tokyo. She began her career as a child actress and has continued working in both live-action and voice acting roles. Standing 150 cm tall, she is active across acting and voice performance. She maintains an official presence on Instagram and X (formerly Twitter).

Name (English)

Seiran Kobayashi

Name (Japanese)

小林星蘭

Reading

こばやし せいらん

Born

September 25, 2004 (age 22)

Origin

Tokyo, Japan

Height

150 cm

Occupation

Actress / Child Actress / Voice Actress

Zodiac / Chinese zodiac

Libra / Monkey

Blood type

A

Measurements

75 / 63 / 85

Agency

AT Production

Active years

2009 -

Works summary

Appearances

114 (2009–2026)

By year (titles with a known year)

2009: 6, 2010: 13, 2011: 16, 2012: 16, 2013: 9, 2014: 7, 2015: 8, 2016: 3, 2017: 3, 2018: 2, 2019: 6, 2020: 3, 2021: 4, 2022: 4, 2023: 2, 2025: 1, 2026: 3, year unknown: 8

Filmography / notable works

• Instagramhttps://www.instagram.com/k_seiran_ta/
• Xhttps://x.com/k_seiran_TA
• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E5%B0%8F%E6%9E%97%E6%98%9F%E8%98%AD
• Wikidatahttps://www.wikidata.org/wiki/Q11461645

Tags

• From Tokyo
• Actress
• Child Actress
• Voice Actress

Last updated

October 18, 2026

Only publicly available facts are listed; non-public or unconfirmed items are omitted. Base data was compiled from Wikidata from June 2026 onward; ages are recalculated daily and deaths are checked against Wikidata on an ongoing basis. Works and profile fields sourced from Wikipedia reflect content as of 2026-08-26. English text is machine-assisted (facts translated by Sonnet, "My Take" written by Opus 4.8). The Japanese page is the source of record.