Allen in the End
After Allen escaped from the order, Hiro stayed behind. She wanted him to lead his own path, for him to realize he can't follow Mana's path forever. When Kanda and Johnny left the order, Hiro went with them. Before she did, she had May-Li record a message for Hana.
"Please listen to me, I'm not coming back to the order. I know you'll try to find me but please don't. Your my little sister and I want you to stay alive longer than I will. You must stay in the order until everything gets sorted out. Just know this, I love you and I will always be with you. Even in the most dangerous times, I'll be there."
She sent May-Li to Hana and left the order. When Allen saw Hiro, he was trying his best to stay away from her so he wouldn't hurt her. But they were alone once and had an argument. Hiro tried to tell Allen to stop looking out for Mana as it was childish while he tried to tell her that he was trying to but couldn't. To stop the argument, Hiro slapped Allen and yelled