Grischa Olbrich is a German actor and voice actor born in 1986 in Altdorf bei Nürnberg, Germany. His professional training includes studying acting at the International School of Schauspiel und Acting from 2014 to 2017, followed by a film acting workshop in 2018. His career encompasses both on-camera performances in German television series and extensive work as a dubbing artist, with over seventy speaking roles recorded in the German synchronous database.

As a voice actor, Olbrich has become particularly recognized for his contributions to German-language dubs of Japanese anime. One of his notable leading roles is Shinpei Ajiro in the series Summer Time Rendering, which in German carries the title Bright Sun: Dark Shadows. He also provides the voice for Lanteveldt in Sacrificial Princess and the King of Beasts, taking over the character beginning with the thirteenth episode. Another significant anime role is Sena Kobayakawa in Eyeshield 21, the protagonist of the American football series.

His anime film work includes a role as Tsuchihashi in the Japanese film Godzilla Minus One. Beyond these titles, Olbrich's voice can be heard across a wide range of anime series. He has performed in Record of Ragnarok as Jataka, in One Piece as Raijin and as Charlotte Kato, in Beelzebub as Ikari, in Deca-Dence as Essam, in Horimiya as Kamioka, and in World's End Harem as Ryuu Mizuhara. Additional anime credits include roles in A Certain Scientific Railgun, Darwin's Game, Yashahime: Princess Half-Demon, Immoral Guild, Urusei Yatsura from 2022, Bibliophile Princess, The Eminence in Shadow, and Witch Watch.

Beyond the anime genre, Olbrich's voice work spans live-action films and television series. His film dubbing credits include roles in the German versions of Godzilla Minus One, Culpa Mia, The Engineer, and Paradise Hills. For television, he has provided voices for episodes of series such as Law and Order: Special Victims Unit, Severance, The Lord of the Rings: The Rings of Power, 3 Body Problem, and Rick and Morty.

His career demonstrates recurring collaborations with specific Japanese voice actors, often voicing characters originally performed by them in the German adaptations. He has frequently dubbed roles originally voiced by Taku Yashiro, including Kazuha in The Eminence in Shadow and Jean in Bibliophile Princess. He has also worked multiple times with material from actors such as Kappei Yamaguchi, Miyu Irino, and Satoshi Hino. Through his work on One Piece, he has voiced characters originated by both Hiroshi Okamoto and Keiji Hirai.