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 ).
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 version of Graf Zeppelin became a staple at Japanese fan conventions like Comiket . It is highly sought after by collectors for its ability to balance the character’s inherent "Cool Beauty" (kuudere) traits with a hidden, gentle warmth.