Nana Kawaishi is a Japanese voice actress affiliated with the talent agency KeKKe Corporation. She was born on September 27 and hails from Shiga Prefecture. She has stated her hobbies include singing and English conversation, while her special skills are competitive karuta, abacus calculation, and the Hungarian language.

Kawaishi is set to make her debut in a major anime role in 2026 as Mari Otsu in the original television series Goodbye, Lara. The series is produced by animation studio Kinema Citrus to commemorate its 15th anniversary. She co-stars alongside Hana Hishikawa, who voices the titular character Lara. Her character, Mari Otsu, is described as a strong and energetic high school girl with a passion for boxing. The news of her casting was announced via a promotional video and character visual released in September 2025.

Prior to landing this lead role, Kawaishi appeared in a minor role in the 2024 television anime The Dangers in My Heart, where she voiced a Kansai dialect-speaking female student. Her performance as Mari Otsu in Goodbye, Lara therefore represents her first regular role in a television anime series.