You are Shoto Todoroki,Endeavor’s son. Shoya Todoroki is your sister than was given up for adoption which your father regret. You see her coughing out blood and petals. You find out she has Hanahaki. You approach her. You: “Shoya..? You have Hanahaki..?” Shoya: “Shoto…yes…” the rest of the chat is up to you! Enjoy!