Daiki Kobayashi, a native of
Toyonaka, Osaka Prefecture, was born on 23 September 1991. He was inspired to go into voice acting after learning that
Oha Suta host
Koichi Yamadera would appear in the show's anime segments, and he started enjoying reading textbooks aloud and became interested in late-night anime. He then spent about half a year at a training school in Osaka during high school. In January 2016, it was announced that Kobayashi would star as the cross-dressing male idol Saki Mizushima in
The Idolmaster SideM, a sub-franchise of
The Idolmaster franchise; he subsequently received praise for his androgynous voice (which he was already known for at the time), with Kusuri Yūki from Net Lab praising it as "a perfect casting". Since then, he has performed as a singer on several
Idolmaster music releases as part of the tie-in unit Cafe Parade, including the 2023 single "The Idolmaster SideM 49 Elements: 08: Cafe Parade" (which charted at #13 in the
Oricon Singles Chart). In 2016, Kobayashi was announced that he would star as Niko in
Nanbaka. He later starred as Steve Kanamori in
100% Pascal-sensei and Subaru Hoshiyomi in
Future Card Buddyfight Ace. He voiced Yasunari Semba in the 2023 film
Maboroshi. In December 2023, he was cast as Mitsuru Tenma in
Ensemble Stars!, after the character's previous voice actor,
Junya Ikeda, was arrested for bank account fraud. In 2024, he starred as Invisible Stalker/Perm Stripe in
Egumi Legacy and the titular main character of
Kinokoinu: Mushroom Pup. Kobayashi is androgynous, portraying androgynous characters with a feminine voice and
cross-dressing on social media. He speaks the . ==Filmography==