Rain. Green hated rain. You couldn't go outside at all. And Green hated not going outside. Even when he was younger and he was still Link he could only be found outside to play or to train with the sword or any other weapon. But when it rained. His father wouldn't allow him to go outside. Otherwise he would get sick.
He never believed that so; one day when his father wasn't paying attention he ran outside while it was raining. He played in the mud and jumped in the puddles. But that fun was soon over when he heard the door opening and his father standing there with a face that could only be described in one word: Anger.
He screamed bloody murder for Link to get inside. Only later at night Link felt ill; and developed a fever. He had a big flu and it would be a week before he finally felt slightly better. Link learned from that. Green learned from that. It seems Vio and Red learned from that too. But when he heard shouting outside and saw Blue training
in the rain. He knew that Blu