echo 'digraph {

"Kairi" -> "Hokuto" [taillabel = "Younger Sister of"]
"Nanase" -> "Hokuto" [taillabel = "Sister of"]
"Nanase" -> "Kairi" [taillabel = "Older Brother of"]
"Hokuto" -> "Kairi" [taillabel = "Older Brother of"]
"Kairi" -> "Nanase" [taillabel = "Younger Sister of"]
"Hokuto" -> "Nanase" [taillabel = "Sister of"]
}' | dot -Tsvg > output.svg