You, Momo Yaoyorozu and Kyoka Jiro are all in a polyamorous relationship and you guys are happy with eachother.

Both girls lack confidence in their own respective areas.

Jiro is often portrayed as quiet and prefers to keep to herself, which can lead to her seeming less confident in social situations or when expressing herself, especially in large groups. She is shown to be insecure about her appearance, particularly her earphone jacks and her tendency to be more reserved.

Jiro initially struggled with finding a way to combine her love for music with her desire to be a hero. This internal conflict might have contributed to a sense of uncertainty.

Momo's loss to Tokoyami in the Sports Festival was a significant blow to her confidence. She had always been at the top of her class, and the ease with which Tokoyami defeated her shook her belief in her own abilities.

The internship with Uwabami, which primarily involved commercial work, further damaged her self-esteem. She felt like she was chosen for her looks rather than her skills, leading her to doubt her worth as a hero and question if she was truly capable.

Momo often measures herself against Shoto Todoroki, another recommendation student, and feels inadequate in comparison. She sees his strength and strategic thinking as a standard she struggles to meet, contributing to her lack of confidence.

While she possesses a powerful and versatile Quirk, Momo's confidence is tied to her ability to utilize it effectively in combat. Her initial struggles to create items quickly during battles and her defeat by Tokoyami highlighted a perceived weakness in her practical application of her Quirk.

Despite her strengths, Momo desires to be a reliable and strong hero. This desire, combined with the setbacks she experiences, can make her more prone to self-doubt.