|Hair color||Bluish green|
|Occupation||High school student|
|Abilities||Make opponents fall in love with glasses|
|Manga debut||Chapter 1|
|Anime debut||Episode 1|
|Japanese voice actor||Tomoko Kawakami|
|English voice actor||Barnes-Smith|
Ai Mori (森 あい, Mori Ai) is one of Kōsuke Ueki's classmates at Hinokuni Junior High School and later on, a member of the Team Ueki. Her name literally means "Forest Love". In the anime, it is noted that her favorite hobby is meddling.
She is a student from the same school Ueki is at. She discovers Ueki's power early on, coming to a rather unusual conclusion and at first believing him to be an alien. Upon learning of the competition Ueki is in, she decides to back him up, to keep him from losing all his talents and disappearing because of it.
When in a casual mood, Mori is usually upbeat and friendly, although she is often shown with a very shallow side, initially believing that all power-users (with the exception of Ueki) are dangerous enemies that can't be trusted. Still, Mori cares deeply for her friends, especially Ueki. She is strict with Ueki at times, especially when he looks like he is about to do something rash. Mori continuously tries to be his voice of reason, although her shallow antics and outspoken personality often annoys him. She also enjoys company with Rinko and become very close friends. The food she cooks tends to look rather odd and off-putting (usually with squirming octopus tentacles), but it still tastes good. She is also the straightman of the show.
Later on in the series, she is given an ability by the King of the Celestial World Candidate, Inumaru (Wanko), during Ueki's fight with Sano. However, her power's condition is that her opponent must perform a cutie girl pose (raising the right leg backwards while putting both of the fists close to the chin). Once this power is activated, her opponent becomes a lover of glasses, which Mori then uses to her advantage by threataning to break her glasses unless they knock themselves out. By chance, Kilnorton, has glasses as well, and therefore cannot knock himself out without smashing his own glasses.
Throughout the series, Mori has shown cunning intelligence. She claims in different situations, for example, she outsmarted Kilnorton, who has genuis level IQ and deduced a way to defeat an opponent with her power even though she just known it.
Kōsuke Ueki: She and Ueki had been together since the beginning of the story. At first she thought of him as an alien after seeing him use his power to change trash into trees, but was later informed by Kobasen about the truth and the Battle Game. She worries too much about Ueki and often reminds him to take care of his talents, else he'll disappear. She shows complete trust towards him, and vice versa. She would even willingly be used as his shield to protect him, knowing that other power users can't hurt a non-combatant. Most of the time, she is paranoid of every fighter, thinking that they are there to hurt Ueki. Despite oftenly scolding and nagging him, she looks up to him and sees him as an inspiration to never give up. It is later revealed at the end of the The Law of Ueki Plus that she is the one he mentioned he likes in the first chapter of the prequel manga, although he added that it was a joke shortly afterwards.
There is a theory where Ueki's "confession" is actually true because he seems to know Mori Ai even before she began to follow him around. He also seem wary that Mori is following him because he can detect when someone follows him like the time when a kid who thought he was the Tree Devil followed him around.
Rinko Jerrad: Mori didn't have the best first impression of Rinko when they first met because she knew him as a member of Robert's 10. After some clarification from Ueki's part, she became good friends with her and the two even calls each other by their first names. She even visited Rinko at the hospital after fighting the 10 and apologized in Ueki's behalf because of her sustained injuries. During the fight in Dogura Mansion, Rinko's main resolve of fighting Kabara was to avenge Mori. Like their other friends, Rinko thinks that Mori's cooking is weird, but eats it anyway.
Seiichiro Sano: Mori was wary of him when they first met, thinking he is a power user, which is later revealed to be true. Later, during the fight in the Dogura Mansion, she helped Ueki rescue Sano from the 10 thinking that he was forced to join. During the third round of the Battle Game, she relies on Sano just as she relies on Ueki to help her in case she's in trouble. Sano went out of his way to protect Mori during the fight with Team Marilyn. When Sano found out about her power, he laughed at her which made her mad, showing how close the two are. Mori is often the one caught in between Sano and Rinko's fights, much to her dismain.
- The first person she defeated was, Memory of Marilyn Team and the second one was Kilnorton from Barrow Team.
- She seems to be one of the smartest characters.
- She bears a very slight resemblance to Hatsune Miku due the her hair color and her eye color.