echo 'digraph {

"Rias Gremory" -> "Grayfia Lucifuge" [taillabel = "Sister-in-law of"]
"Sir Zechs Lucifer" -> "Grayfia Lucifuge" [taillabel = "Wife of"]
"Akeno Himejima" -> "Rias Gremory" [taillabel = "Friend of"]
"Issei Hyoudou" -> "Rias Gremory" [taillabel = "In love with"]
"Sir Zechs Lucifer" -> "Rias Gremory" [taillabel = "Younger Sister of"]
"Rias Gremory" -> "Sir Zechs Lucifer" [taillabel = "Older Brother of"]
"Grayfia Lucifuge" -> "Sir Zechs Lucifer" [taillabel = "Husband of"]
}' | dot -Tsvg > output.svg