The Brief: The ninja emoji features a person with a Ninja-style shirt, face covering, and sword.
The ninja emoji (🥷) is part of Unicode’s 13.0 emoji collection for 2020. There are six different skin tone options for the ninja emoji. This symbol can be used to represent an actual ninja or someone who is sneaky, stealthy, or otherwise ninja-like.
— Emojipedia (@Emojipedia) September 8, 2020