Tsunami begins as a royal candidate for the throne of Juraihelm, selected by the realm's council to become queen despite competition from her rival, Ramia. Her ascension depends on restoring cosmic balance between good and evil through an Earth representative, leading her to choose the human schoolgirl Sasami Kawai as the magical warrior Pretty Sammy. This choice defines her core narrative role. In the Bonus Theatre specials, specifically the "Magical Girl Lyrical Amira" segment, Tsunami faces Ramia—disguised as the titular Lyrical Amira—who attempts repeated assassinations to stop Tsunami's coronation. These attempts include pit traps, dropped flower pots and steel beams, planted bombs, and cannon fire. Each fails, backfiring to injure Amira instead. Tsunami remains unfazed, ultimately thwarting Amira by hitting her with a giant mallet while recalling their shared childhood play. This reflects her patience and tolerance, viewing Ramia's schemes as immature antics rather than true threats. Across the franchise, Tsunami is a benevolent yet somewhat detached figure. She delegates maintaining earthly balance to Sasami and her advisor Ryo-Ohki, intervening minimally. Her characterization varies: the OVA presents a regal demeanor, while the TV series depicts her as more carefree and whimsical. The Bonus Theatre specials align with this latter, playful interpretation, emphasizing her resilient good humor against Ramia's aggression. Tsunami's relationship with Ramia is adversarial yet rooted in familiarity, evidenced by her nostalgic reaction during their confrontation. Despite Ramia's persistent sabotage attempts, Tsunami's position remains secure, underscoring her inherent legitimacy as Juraihelm's chosen queen. The specials show no significant character evolution for her, reinforcing her established role as a stabilizing force who meets conflict with amused equanimity.