Three punks mocked her for actually believing the letter and they were later beaten in a basketball game by the other three girls. The Youma was possessing Takeru's body. The Youma starts to go after him and Makoto shoves Takeru out of the way. The Youma wraps its snake-like whip around her neck and reaches out toward Takeru but he screams and runs away. She finishes the Youma on her own as Sailor Jupiter after being told by a Guardian Sailor Moon that she isn't alone. Usagi later drags Makoto and Rei on a triple date with Motoki, Mamoru, and Motoki's friend Takai. During the date, she was paired up with Mamoru and showed off her skills in rowing on a pond boat. While walking across the Hikawa Shrine, she spots Rei being forced against her will into a limousine, prompting her to believe it is a kidnapping. She goes to the hotel and after a tussle with bodyguards, Rei lets her in and explains she is having one of her monthly lunches with her politician father. Seeing how sad this makes her, Makoto proceeds to sneak Rei out.
Makoto followed Mamoru and Usagi together, when she wanted to give him a Valentine's scarf and finds out he about Hina. When Tuexedo Kamen runs to help Sailor Moon against a Youma, Makoto confronts him and asks if he is Mamoru. She asks him his motives, and explains he's trying to find that out. Makoto demands to know if he's using Usagi. Tuxedo Kamen looks back at her and indifferently asks, "What if I am?" Makoto punches him in the face and knocks him to the ground. She tells him won't tell Usagi his identity he needs to stay far away from her. Makoto gave Motoki the scarf, she had to knit for a class project, in passing. Makoto was quite guarded as a result of being alone for so long and afraid of putting Motoki in danger because she was a senshi. In fact, she awaken in her inner senshi by being alone. Luckily, Motoki was quite persistent and Makoto eventually realized that she doesn't have to be alone. A youma is attacking the city and Makoto has to transform into Sailor Jupiter in front of Motoki. Their connection grows stronger from this, and he gives her a turtle-shaped good luck charm with a small bell to protect her while she's fighting.
Sailor Jupiter wears a pink belt called the Rose Belt with an attached translucent spherical container which held rose petal potpourri. It could, but never proven, be the source her attack Flower Hurricane, in which she shoots a flurry of flower blossoms at an enemy. Sailor Jupiter's strongest attack generated from her Sailor Star Tambourine called the Jupiter Thunderbolt, a powerful lightning bolt. During the Special Act, which takes place four years after the series finale, Makoto owns a floral shop and designs the floral arragements and Motoki is shown helping her out. The two seem to be dating, and at the end, Motoki catches the bouquet at Usagi and Mamoru's wedding and proposes to Makoto, who accepts.