|| hello hello!
|| For your first question: Jacob, Markus, Oliver, Torrin, Michael, and Nicolas all crashed there together! The MC finding out more about it will be explained in alter days!
|| As for the pre-established relationships between the guys, those were developed long before crash landing on the island, and the opinions they had on each other before the crash still stand! They don't go yandere for each other due to these previously established bonds that had been made for years (whether it be fwb, friends, or reluctant friends)! They're all able to go yandere for MC because they DON'T have any sort of emotions towards them from before! This allows new hormone signals to be made due to the curiosity!
|| Torrin became the leader because he was the main leader of the friendgroup and the reason why they all hung out with each other!
|| Also, yes! If you got Markus's route, he comes to wake you up in the morning! Part of the gameplay is that you don't get to choose your yandere! The yandere chooses you!
~ stay tuned!