Yasuda

Biodata

Background / History

Before the first-year assessments, Yasuda struggled to fully control his water flow and relied on Takahashi Rin for help. He repaid her assistance with specially created water containing energy that benefits the skin. 15

During Class B's pool-draining assessment, he defended the water stored in the natatorium and mistook Shibata's use of a water pump for an attempt to take it for Takahashi. His actions prompted Class B to investigate his ability and his relationship with the logistics teacher. 12

Class B's initial attempt to confront Yasuda at the pool was disrupted by Ryuen Kakeru. Yasuda withdrew to manage the Water People engaging Class C, then personally ended Ryuen's escalating fight with Itozawa's group after it exceeded the assessment's intended scope. 13 14

Ichinose and Takahashi later proposed using Yasuda's Special Water for logistics-equipment maintenance, with students handling regular maintenance as an assessment. The plan addressed Yasuda's concerns about workload, water use, safety, and staffing; he accepted the proposal and agreed to assist Class B. 17 19

Personality

Yasuda is initially guarded and possessive of the water he creates, reacting aggressively when he believes others are taking it without permission. He attempts to misdirect water toward Class B during his confrontation with Takahashi, but quickly relents when Ichinose redirects the conversation to the assessment. 12 18

Once presented with a practical plan that reduces his workload and lets him contribute to equipment maintenance, he becomes cooperative and enthusiastic. He is also patient and attentive as an instructor, tailoring swimming advice to students' individual abilities. 19 45

Abilities & Skills

Water: Moistening

Kanzaki identifies Yasuda's Water Ability as Water: Moistening, rather than an endless-water ability. Yasuda can create and control water, including a form of Special Water with practical properties. 12

• Creates Special Water containing energy beneficial to the skin. 15
• Controls water flow precisely enough to redirect a large surge back into the pool and stop an ongoing battle. 14
• Creates Water People used in Class C's assessment. 13 23
• Can shape the natatorium's water into fountains, waterfalls, aquatic decorations, and wave-like poolside structures. 44
• His water can be countered by Takahashi Rin's Word Spirit, which purified the Water People and evaporated water directed toward students. 18

Swimming Instruction

Yasuda is a skilled swimmer and practical instructor who teaches fundamental technique alongside ability-specific adjustments. 45

• Defeated Shibata, Ando, and Kanzaki in a 50-meter race; he countered Kanzaki's attempted Mental Attack during the event. 44
• Advised Shibata to use core strength to support his Dynamic Balance while swimming. 45
• Taught Ando to apply her Body Control with greater fluidity and rhythm in the water. 45
• Organized a swimming competition with a reward of 1,000 Energy Stones. 45

Relationships

• Takahashi Rin — Logistics teacher and longtime associate. She once helped Yasuda control his water flow; he rewarded her with Special Water, and they later cooperated on the logistics-maintenance assessment plan. 15 19
• Ichinose Honami — Class B student who negotiated the maintenance proposal that reduced Yasuda's workload and secured his cooperation. 17 19
• Itozawa — Class B student who helped investigate Yasuda's ability during the pool assessment and later requested leniency for Class C. 12 29
• Ryuen Kakeru — Student whose intervention complicated the pool assessment. Yasuda stopped Ryuen's fight with Class B after it became too dangerous. 13 14
• Kanzaki Ryūji — Student who attempted to use a Mental Attack against Yasuda during a swimming race, only for Yasuda to counter it. 44

Story Role / Major Arcs

Pool-Draining Assessment

• Becomes the central obstacle in Class B's first assessment because he stores and protects water in the natatorium. 12
• Faces Class B's covert attempt to restrain his water control, but Ryuen's interference forces him to leave and handle Class C's Water People. 13
• Stops Ryuen's violent confrontation with Itozawa's group, declaring that the incident has exceeded the assessment's scope. 14
• Accepts Class B's revised solution: a Special Water-based logistics-maintenance assessment that also reduces his workload. 17 19

Swimming Lessons and Competition

• Transforms the natatorium into an elaborate underwater-themed environment for swimming class. 44
• Challenges students to race him, demonstrating the gap between raw confidence, ability use, and swimming technique. 44
• Provides individualized swimming instruction and oversees Class B's competitive races. 45 46

Notable Quotes

“Enough, Ryuen Kakeru. This assessment has exceeded its expected scope. Your actions are no longer just an assessment.” 14

Trivia

• Yasuda's office resembles an aquarium and contains books and posters concerning underwater ecosystems, hydrology, and fluid dynamics. 19
• He initially mistakes Class B for Class A when offering assessment assistance. 19