echo 'digraph {

"Aruto" -> "Kokoro" [taillabel = "Younger Sister of"]
"Iina" -> "Kokoro" [taillabel = "Younger Sister of"]
"Aruto" -> "Iina" [taillabel = "Older Sister of"]
"Kokoro" -> "Iina" [taillabel = "Older Sister of"]
"Iina" -> "Aruto" [taillabel = "Younger Sister of"]
"Kokoro" -> "Aruto" [taillabel = "Older Sister of"]
}' | dot -Tsvg > output.svg