echo 'digraph {

"Hazuki Onigami" -> "Mutsumi Onigami" [taillabel = "Older sister of"]
"Mei Onigami" -> "Mutsumi Onigami" [taillabel = "Older sister of"]
"Hazuki Onigami" -> "Mei Onigami" [taillabel = "Younger Sister of"]
"Mutsumi Onigami" -> "Mei Onigami" [taillabel = "Younger Sister of"]
"Mutsumi Onigami" -> "Hazuki Onigami" [taillabel = "Younger Sister of"]
"Mei Onigami" -> "Hazuki Onigami" [taillabel = "Older sister of"]
}' | dot -Tsvg > output.svg