Hiryu Rin/Synopsis

U.A. Sports Festival Arc
All of Class 1-B participates in the Obstacle Race along with rest of the 1st-year students. When Shoto Todoroki causes one of the Villain Robots to collapse, Hiryu suggests to the participants to team up temporarily to move the robots out of the way. He is revealed to be one of the few students who doesn't agree with Neito Monoma's plan to stay in low ranks to overthrow Class 1-A.

After the previous event, he teams up with fellow classmate Jurota Shishida in the Cavalry Battle. He attempts to snatch Team Midoriya's headband like many other competitors but Team Todoroki ends up freezing multiple rival teams, including his. Hiryu and Itsuka Kendo watch in despair as Shoto makes off with their stolen headbands. As the event ends, Hiryu is unable to continue to the tournament finals.

Forest Training Camp Arc
On the day of the forest lodge trip, when Neito Monoma mocks Class 1-A, Hiryu is seen observing.

When Class 1-B arrives at the training camp. Homeroom teacher Vlad King explains they will be extending their quirks and the more they use their Quirks, the stronger they will be by breaking their limits. When Class 1-B witness Class 1-A's training. Afterward, Itsuka asks Shota Aizawa if can they observe everyone, he explains that is the reason The Pussycats are around. Hiryu notes that seeing their rivals push themselves to their limits is quite terrifying in terms of overwork.

Hiryu, along with most of the rest of Class 1-B, is out in the woods when the Vanguard Action Squad attacks the camp. He’s one of the many people incapacitated and placed in critical condition by Mustard's gas.

Joint Training Arc
Hiryu and the rest of Class 1-B show up for the Joint Training Exercise, with Neito loudly claiming that the momentum is now moving to their side. Upon selecting teams, Hiryu is paired up with Jurota, Ibara Shiozaki, and Kosei Tsuburaba for the first match.