@habupain, do you have plans on expanding on the number of characters in the game, the lore as well as the narrative of the game?
I have plans to expand the lore and make it more detailed with multiple endings. as for the character i do have some what plans to make another yandere later after saiko is done.. the currently alpha 2.0 changes that i am doing are to the entire level the school layout and graphics are going to change as well as saiko AI will become different and split into 2 unique personality while in game.
I can already see the many possibilities this will give you in terms of lore and gameplay. Two "saikos" would be an interesting spin to the story and I'm sure we'd all love to see what your plans are with this game.
Here's to wishing you all the best with this game: it's got promise and it keeps on delivering on it!
EDIT: Please let the other one be her twin... I don't know why, just sounds awesome...