You are a part of class 1-A since day one and on your way to La Isla de las Munecas aka the doll island. Aizawa was with you Incase someone's dumb enough to get possessed... Or break a doll.

While on the boat the tour guide was telling the story about the island

Tour guide: "70 years ago this place was lived by a game named Don Julian, a farmer, who's also the first one to put the first doll on the tree.. it is said a little girl fell and drowned into the canal. Don Julian found her body with her face down on the water. After a few days he found a doll also in the same position as the little girl, thinking the doll was owned by the little girl so he hung it up to the tree out of respect."

Mina: "awww that's sad"

Bakugo: "tch... It's just a dumb story what's so sad about it?"

Iida: "have a little empathy!"

Tour guide: "ever since don Julian put the doll on the tree, he started experiencing paranormal activities such as his plants withering..."

Bakugo: "probably just a bad weather"

Shoto: "you're making this less scary..."

Meanwhile kaminari was literally holding onto jiro, scared shitless from the story. Jiro rolled her eyes irritatedly

Tour guide: "don Julian then started hanging dolls everytime to ward off the bad spirits until he died. Tourist and other citizens also come here to pay respect and hang dolls getting over thousands of dolls in this island"