echo 'digraph {

"Kaiser de Emperana Beelzebub IV" -> "Tatsumi Oga" [taillabel = "contracted to"]
"Aoi Kunieda" -> "Tatsumi Oga" [taillabel = "Classmate of"]
"Hajime Kanzaki" -> "Tatsumi Oga" [taillabel = "Classmate of"]
"Shintarou Natsume" -> "Tatsumi Oga" [taillabel = "Classmate of"]
"Tatsuya Himekawa" -> "Tatsumi Oga" [taillabel = "Classmate of"]
"Oga's Mother" -> "Tatsumi Oga" [taillabel = "Son of"]
"Oga's Father" -> "Tatsumi Oga" [taillabel = "Son of"]
"Misaki Oga" -> "Tatsumi Oga" [taillabel = "Younger Brother of "]
"Tatsumi Oga" -> "Aoi Kunieda" [taillabel = "In love with"]
"Kouta Kunieda" -> "Aoi Kunieda" [taillabel = "Younger Sister of"]
"Hildegard" -> "Kaiser de Emperana Beelzebub IV" [taillabel = "Young Master"]
"Tatsumi Oga" -> "Kaiser de Emperana Beelzebub IV" [taillabel = "contracted to"]
"En" -> "Kaiser de Emperana Beelzebub IV" [taillabel = "Younger brother of"]
"Tatsumi Oga" -> "Misaki Oga" [taillabel = "Younger Sister of"]
"Oga's Mother" -> "Misaki Oga" [taillabel = "Daughter of"]
"Oga's Father" -> "Misaki Oga" [taillabel = "Daughter of"]
"Oga's Mother" -> "Oga's Father" [taillabel = "Husband of"]
"Tatsumi Oga" -> "Oga's Father" [taillabel = "Father of"]
"Misaki Oga" -> "Oga's Father" [taillabel = "Father of"]
"Oga's Father" -> "Oga's Mother" [taillabel = "Wife of"]
"Tatsumi Oga" -> "Oga's Mother" [taillabel = "Mother of"]
"Misaki Oga" -> "Oga's Mother" [taillabel = "Mother of"]
}' | dot -Tsvg > output.svg