echo 'digraph {

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