So now that Subaru is Sakurazukamori this means he'll get killed by the person he loves the most ... and that person will become the future Sakurazukamori.
Now who would be the "person Subaru loves the most"? Seishirou's deeeeeaaaaad.
Subaru will never train a 14th head of the Sumeragi clan now, he’s too corrupted. And he will never love another, so there will be no successor to the Sakurazukamori clan. He’s a dead end for both lines, and I think that’s beautiful (cripplingly painful).


















