Yep, even on that one, when you click on the second "here", they explain it's a joke from 2chan. The website for this Vocaloid is fake too, it's not Crypton but CrVIPton.
Kadorhal said: Wait, why is this tagged "yandere"?
Unlike Miku and Luka who seem to be yandere as the situation requires, Tei is yandere by default. She wants to kill Miku and is in her own warped little sense of love with Len.
LightningRamiel said: Unlike Miku and Luka who seem to be yandere as the situation requires, Tei is yandere by default. She wants to kill Miku and is in her own warped little sense of love with Len.