It's a redirect, people kept searching for Chara on the Deltarune Wiki. It means typing that name will redirect the reader to Chara's article on Undertale Wiki too.
So people are stupid, ok
I like to think of it as a little convenience for people to go to the other wikis if they want to, like how "Kris" on Undertale Wiki goes to Kris's article on Deltarune Wiki.
What do Toby's initials have to so with this?
You mean Terry forflick