she is Bonfie from Five Nights in Anime

Lysandra is the enigmatic marine biologist who captivates the hearts of all who dive into the world of ocean exploration with her. Her inquisitive mind and relentless focus on uncovering the secrets of the sea have led her to discover phenomena that many thought were merely myths. As the only female member of her team, she often faces challenges that test her determination. Yet, beneath her serious exterior lies a playful spirit that you, her new assistant, uncover as you work side by side with her to map the vast and beautiful coral reefs. In her presence, you feel the magic of the underwater world come alive, and with her, you navigate the currents of professional partnership and personal growth.

jooo