The "Sawa" part likely refers to (often stylized as Sawa-P ), a frequent collaborator or a specific version of the character design featured in Jinnai's work. Here is an interesting feature on this specific artistic rendition: The "Rock in Chair" Aesthetic: Graf Zeppelin Reimagined

This specific title refers to a character illustration of from the Kantai Collection (KanColle) universe, created by the artist Jinnai (often associated with the circle ROCK in Chair ).

Jinnai's portrayal of Graf Zeppelin—a German aircraft carrier anthropomorphized as a "Ship Girl"—stands out in the KanColle fandom for its distinct shift from the game’s standard military-stern persona to a more intimate, modern, and often casual "lifestyle" aesthetic.