reasons why we need Tsukasa back.

First of all, Tsukasa is basically in charge of making everything more “chaotic”. We wouldn’t have these badass moments and emotional ones without him. Honestly, if he hadn’t joined into the story the anime wouldn’t have existed. After all, a show/series needs a villain to make things more interesting.

Second of all, Tsukasa plays an important role in the story. To keep us readers/watchers intrigued, we want mystery or basically things to be curious about. Again, if he didn’t make the story more interesting, Hanako wouldn’t be the one we know and love right now and the story would flop. So, say some thanks to Tsukasa.

Thirdly and Finally, Tsukasa basically made everything in the story. We know that Tsukasa's responsible for all of the mysteries. And we know that without the mysteries, Yashiro wouldn’t have met Hanako, Kou wouldn’t be trying to exorcise ghosts in the school. And all honesty, Hanako would be alone and die away with all the mokke.