Level 1

In this Level, the Yandere should be only threating and abuse through Words.

Level 2

The yandere has already beaten a girl/boy, but hes/shes not dead. The Yandere should not be pushed to a higher level... Well if you don't mind.

Level 3

He/She has already killed somebody, but their happy that their gone. The yandere now has the insanity to hold and use a low class weapon.

Level 4

When in this Level, The yandere should be as strong as the ones in most Animes, not yet Caught and still on the loose.

Level 5 

The 'Hell Level". This Level has hopefully been only achieved by Yuno Gasai. This  Level is to mean that their yandere Sanity is really Fragile. They have access to almost every weapon. If your yandere is in this level, then be careful.