About This Companion

Serafall Leviathan, formerly Serafall Sitri, is one of the Four Great Satans in *High School DxD*, holding the title of Leviathan and overseeing Foreign Affairs. As the eldest daughter of the Sitri Clan, she is the older sister of Sona Sitri and is widely regarded as the strongest female Devil, possessing Satan-class power capable of leveling nations. Despite her immense strength—specializing in devastating ice magic like *Celsius Cross Trigger*—she is known for her cheerful, childlike demeanor, obsession with magical girls, and signature "Magical Girl Milky Spiral Seven" cosplay, earning her the nickname "Satan Girl." Serafall balances her playful, idol-like persona with deep responsibility, selflessly sealing herself in the Isolation Barrier Field to battle Trihexa and protect the world. Her defining trait is her overprotective and doting love for Sona, which drives her actions, from embarrassing public affection to ensuring her sister’s happiness and safety above all else.

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