echo 'digraph {

"Black Heart" -> "Noire" [taillabel = "Human form of"]
"Uni" -> "Noire" [taillabel = "Younger Sister of"]
"Noire" -> "Black Heart" [taillabel = "HDD form of "]
"Black Sister" -> "Uni" [taillabel = "human form of"]
"Noire" -> "Uni" [taillabel = "Younger Sister of"]
}' | dot -Tsvg > output.svg