Lamalfa Michelle Tateyama is a Japanese female voice actress affiliated with the agency Crazy Box. She is a graduate of the Japan Narration Acting Institute. Her interest in becoming a voice actor was sparked during her second year of middle school after watching the anime K-On! and subsequently learning about the profession behind the characters.

Her professional anime debut came in 2021 with the role of Mujika Yadoki, also known as Mujika, in the television anime series Wixoss Diva(A)Live. This role was part of the dance-themed diva unit Diagram within the series. Following her debut, she has continued to build her career with various roles in anime, games, and dubbing. Her subsequent anime credits include a role in The Iceblade Sorcerer Shall Rule the World and the character Mika in the 2025 anime series Kaoru to Rin wa. She is also set to voice the character Lillian in the upcoming anime adaptation of The Strongest Job is Apparently Not a Hero or a Sage, but an Appraiser!, scheduled to premiere in April 2026.

In addition to her work in anime, Tateyama has contributed her voice to several video games. Her game credits include Melissa Siola in Arteil Chronicle, Naluka in Last Period: The Never-Ending Spiral Story, and Scheherazade in Quiz Magic Academy: The Wizard and the Black Cat. More recent game roles have been in major titles such as Uma Musume Pretty Derby, Princess Connect! Re:Dive, and Goddess of Victory: Nikke. Her dubbing work includes a role in the second season of the series Wednesday.

From her early career, she has worked alongside other voice actors on multiple projects. Notably, she has shared credits with Yūki Hirose on at least three productions, and with Tomoyo Takayanagi, Mayu Mineda, and others on at least two. Her personal interests include playing the guitar, makeup, visiting cafes, and singing. She also possesses language skills in Spanish and Portuguese.