Yep all of the pirates are different types of yanderes. (I can specify if you want me to.)
Currently there are 2 bad endings for Leon, 1 good ending for Leon and 1 good ending for Riley (and there's also a general normal ending). I have planned in my head to make at least 1 good and 1 bad endings for all of the characters. I'll probably come up with more endings for the new (and hopefully completed) version of the game, so stay tuned. Mwah <3