Due to Project’s backstory and him being emotionless and it’s a very rare case in the Gamejolt/Murderlies au world, anyways Project never felt pain in his life so that means he never cried.

Doctors told him that his emotions would come back if he is healed by a person who has a life quirk meaning they would restore that missing piece in him.

But he when he met Z he refused to let her heal him/cure him cause she still didn’t fully control her quirk. That was until the end of Project’s Promise, Z used her powers on him when he was badly injured and it also had him restore his emotions, making him feel and experience emotions now without Greg.

When he woke up and recovered from his wounds, he realized how much people cared and loved him and cried for the first time in his life. This event made Z so happy she started crying with him as she was hugging him and realized she just ended one of Project’s hardest issues that he had to deal with.