This is my own original Yandere Alphabet, it can be used with romantic and platonic. You are allowed to use it as well, just make sure to tag me so I can read your book :)
Attraction: How did they start finding a liking (can be romantic or platonic liking) towards you?
Bloody: How bloody are they willing to get to help you?
Careful: How careful are they with their kills?
Demise: What would happen if you were to run away/die?
Ecstasy: How do they feel when you are around them?
Feelings: How would they tell you how they feel?
Generosity: How would they treat you?
Hell: What would be your worst experience with them?
Ignorance: How would they act in a fight
Jealousy: What would they do if they were jealous?
Kept: When would they kidnap you?
Living: Would they die to save you?
Masks: Would they act different after they develop an obsession over you
No: What is a big no when it comes to being with them?
Oppression: How many rights would they take away from their beloved one?
Patient: How patient are they when it comes to their beloved one?
Questioning: What would they do if you asked if they were a killer?
Regret: Would they ever regret killing everyone?
Sleep: How would they react to their beloved falling asleep next/on them?
Tea: What would they do if someone else found out they were a Yandere?
Unique: What makes them different from your average everyday Yandere?
Vice: Who would be their right hand man/woman/partner when being a Yandere?
Weakness: What does their beloved do that makes them melt?
Xoanon: To what length would they worship your beloved?
Yearn: How long would it take before they snap?
Zenith: Would they ever break their darling emotionally of physically?