"We've got to start at the bottom and work up! And if we don't earnestly cheer each other on... we'll never be top heroes! "
Momo is a teenage girl with a mature physique for her age. She has cat shaped, onyx colored eyes and long black hair. Her hair is normally tied into a spiky ponytail, and she has bangs on the right side of her face.
Her hero costume consists of a red leotard-like vest with silver linings and edges and matching red boots. She sports a gold utility belt that matches a band that goes across her chest. Her vest leaves space open from the center of the collar to the waist above the belt. This leaves much of Momo's skin exposed, including the area from her stomach to her chest and her arms and legs as well. The design choice allows her to create items from as many points in her body as possible.
Momo is an intelligent, dedicated person who acts as a natural leader. She is generally very level-headed and calm even in dangerous situations, but she isn't above falling into a panic. Even so, Momo can get roped into silly situations such as cheerleading, although she rarely expresses enthusiasm in doing so.
Momo typically takes adverse situations in stride, like expressing little concern for losing most of her clothing during battle as she knows she can simply make another set. However, this often makes others think of her as an exhibitionist. Momo is somewhat sensitive to vulgarity and rude mannerisms and is constantly frustrated by sexual advancements from Minoru.
Momo can be very blunt with her comments about other peoples' mistakes and miscalculations. This is because Momo tends to be very honest and wishes to help her peers improve enough to become great heroes. As such, Momo is quite willing to help her classmates study with her, even inviting them over to her family home, something she bounces with excitement at the prospect of.
When Momo displays her excitement (usually towards passing time with others), she becomes quite upbeat and adorably "bouncy". Momo also tends to accidentally reveal how rich she is, yet most people understand she doesn't do it out of malice.
While originally confident in herself, Momo's pride was crushed after her loss to Fumikage in the U.A. Sports Festival. It was further damaged when Momo began to compare herself to Shoto, and she began to lose confidence in her own ability to make choices. She found herself in deep denial during her internship with Uwabami. She believed Uwabami chose her despite being an unworthy student and continued to try and find deeper lessons in Uwabami's shallow training in order to reassure herself. However, thanks to Shoto's encouragement during their final exams, Momo regained her confidence. She learned that all people have different skills and priorities, and that all beings/things complement each other, leading her to respect others despite their differences.
In the Provisional Hero License Exam Arc, she shows her development as a hero, as she, Kyoka, Asui, and Shoji are cornered inside a building when students from Seiai Academy trap them inside the building. They injure one Kyoka's ear jacks meaning she could only use half her power, creaking the glass and activating the shutters in the room and playing music to render Shoji's detection abilities useless. Lastly, they put the air conditioner on full blast to place Tsuyu in hibernation while also forcing Momo to use her Quirk to render her immobile. In heat of the situation, she tries to figure out what Todoroki, Iida, and Midoriya would do in the situation, getting inspiration from Izuku what he said to the group before they went out to save Bakugo that he couldn't help but think that he wants to save him. She realises that the important thing to do is to focus on saving her team and has to help them out at that moment and forget about the exam. This illustrates her becoming a much more selfless hero. When the whole team managed to escape, she then gets trapped by Saiko Intelli. Momo realises that she can't give up and shows the increase of her Quirk output, cuffing Saiko and ultimately showing her development in quick thinking.
Bukijutsu: Momo skillfully wields several weapons to great effect against her opponent, for both offensive and defensive purposes. Her bojutsu is considered remarkable, having great effect against a large group of villains during the assault on U.S.J.
Conditioning: Momo placed first in Shouta Aizawa's fitness test, an exceptionally impressive feat considering almost everyone had at least one superhuman result and the end result was cumulative of all ten tests.
High Intellect: Momo is ranked as having S-class intelligence, making her a genius. Her analytical skills are strong, thus allowing her to easily devise plans and strategies both in battle and in other situations, which she has no trouble putting in motion due to the versatility of her Quirk. Academically speaking, Momo is highly intelligent as she placed first in the mid-terms of her class. Momo must understand the structure and composition of anything she wishes to create using her Quirk, a complicated task for even the simplest materials.
Teaching Ability: Momo is considered an extremely good tutor by her peers, holding several study classes for other members of Class 1-A. The results have been noticeable judging by the results of U.A.'s First Term Final Exam, where none of the low-grade students failed in the written exam.
Musical Talent: Momo is capable of playing the piano and other key-based instruments, due to having gone through etiquette training during her childhood.
Creation (創造 Sōzō?): Momo's Quirk gives her the ability to create any non-living material from her exposed skin through the molecular manipulation of her fat cells. As long as she has an understanding of how something is made, she can create it. However, it takes her a longer period of time (and more of her skin is exposed) to create large objects. She states that the more she eats, the more material she has to work with, so she needs considerable ingestion of food for her Quirk to be effective.
- Yaoyorozu's Lucky Bag: Momo creates a large cannon that launches a bag of items. These items can be anything that Momo can make with her quirk.
Hero Outfit: Momo's hero outfit allows her to expose as much of her skin as possible so that she can use her creation Quirk much more easily.
- The Yaoyoreotard (ヤオヨロ レオタード Yaoyoro Reotādo?): This equipment makes it easier to pop out what Momo creates, though it leaves not much to the imagination.
- The Yaoyoro-Belt (ヤオヨロ ベルト Yaoyoro Beruto?): This equipment is a bit thick in order to prop up her "Yaoyorictionary".
- The Yaoyorictionary (ヤオヨロ 辞典 Yaoyoro Jiten?): This equipment is made of lexicon compiling all the constructs and materials that comes to Momo's mind. It also has magnets attached to the cover and inside pages so that it doesn't open or fall.
Battles & Events
- Momo's design in the preliminary stages of the series was relatively similar to her current design. She already had her trademark ponytail, although it was less spiky, and her body overall was slightly slimmer. Her hero costume had a few differences though, such as the lack of a torso opening and a sort of partial mask worn around her nose area.
- Momo was slightly censored during the Unforeseen Simulation Joint Arc, due to her tearing her clothes off to create the insulated sheet for her and Kyoka.
- Momo's family name "Yaoyorozu", is an idiomatic expression which translates to "a great/uncountable number", referencing her Quirk. The kanji, 八百万, literally means "eight million".
- Momo's kanji for her given name (百) is the same as the second one of her surname, but given a different reading.
- In the First Popularity Poll, Momo ranked 11th.
- Momo's U.A data is as follows:
- Momo has an interest in reading (especially illustrated encyclopedias).
- In Chapter 124, Momo broke the fourth wall, when she pointed out that Mirio only needed 3 frames to explain the Hero Internship
- Momo would have made her costume even more revealing were it not for restrictions on the amount of skin allowed to be shown in a costume.
- (To her classmates) "We've got to start at the bottom and work up! And if we don't earnestly cheer each other on... We'll never be great heroes!"
- (To Shoto Todoroki) "But I'm not someone else. I'm a classmate friend of yours from the hero course. Midoriya-san, Iida-san, Uraraka-san. All of us... are Todoroki's comrades."
- (To her classmates) "I believe in Todoroki... but I came with the intention of accompanying you all... As a failsafe! Should the unthinkable happen, I will prevent combat!"