OVA
Description
Yuuji Sakamoto is the class representative of Fumizuki Academy's Class 2-F. His placement there results from intentionally neglecting his studies, a deliberate choice despite his high innate intelligence and background as an elementary school prodigy. He underperformed on the entrance exam due to his conviction that grades do not determine a person's value. His strategic mind remains acute, frequently crafting complex battle tactics for Class F during Summoner Test Wars. These plans often rely on psychological manipulation, underhanded tricks, and exploiting rivalries among higher-ranked classes to counter Class F's academic disadvantages, sometimes earning perceptions of cowardice.

His personality blends laid-back indifference with calculated ruthlessness. He exhibits sadistic tendencies, particularly in bullying his best friend Akihisa Yoshii, yet demonstrates fierce loyalty and protectiveness towards classmates, defending Shouko Kirishima's feelings or protecting Akihisa from bullies. His relationship with Shouko, his childhood friend and romantic interest, is complex; he consistently denies feelings for her, though his summon's manifestation reveals his true emotions. He shows significant fear of Shouko's reactions, especially her marriage ultimatums, which serve as motivation for him to study.

In the OVA "Baka to Test to Shoukanjuu: Matsuri," Yuuji participates in the school festival to raise funds for Class F's equipment, driven partly by the need to prevent Mizuki Himeji's potential transfer due to her father's concerns about Class F's poor facilities. He organizes class efforts for the festival, including a maid café. His avoidance of Shouko intensifies during this period as she leverages the situation to pressure him into marriage should he fail academically.

His summoned being reflects his personality and academic standing. It typically manifests wearing brass knuckles and a punk-style long coat adorned with a Class F badge. Its combat power directly correlates with Yuuji's test scores, which improve significantly after he resumes studying. Following the Volume 2 tournament, he acquires a platinum bracelet enabling him to deploy a summoning field, though this temporarily restricts summoning and consumes points. During special events like the "Test Run" or "Future Teller Test Run," his summon takes unconventional forms, such as a werewolf symbolizing wildness or an embarrassing masochist-adult version that he immediately dismisses.

Across the series, Yuuji experiences significant development. Initially content in Class F, his academic efforts intensify, leading to improved test scores and a stronger summon. By the light novel's conclusion (Volume 12.5 After Story), he advances to Class 3-A and assumes the role of President of the Disciplinary Council, marking his growth beyond tactical prowess into a position of institutional responsibility.