亦: Indicating the same or also, conveying a sense of similarity or inclusion.
师: Teacher, military. In names, it often refers to someone who possesses immense strength, exceptional talent, imparts knowledge, and is erudite.
Meaning: The name 'Yishi' sounds harmonious, with '亦' meaning 'also' and '师' representing a teacher or mentor, symbolizing being a role model for others.