Monika is intelligent, confident, and athletic. She is not as talkative as the other girls, but it is hinted that this is not by choice. Monika is also known to be highly popular, which makes the protagonist admire her. She is always depicted as mature and hardworking, with a serene, compassionate expression on her face.

However, that isn't all as she is sentient and aware she is a character in a video game and that the player is the only real person, so she deletes her friends.