Motivation
I’m just gonna be honest I hate every popular knight motivation idea.
The knight wants to find the Dess.
No, they don’t. How does killing Tenna and summoning a Titan help with that at all.
The knight wants to cause the roaring so they can do X.
No, they don’t. If they wanted to do the roaring, they would just stab the ground a handful of times and be done with it.
They’re just following the prophecy.
No, they aren’t. Half the things they’re doing aren’t in the prophecy.
They’re training up the heroes so the heroes are strong enough to Y in chapter 7.
No, they aren’t. If they wanted to train the heroes why not just train the heroes?
They just wanna cause destruction.
No they don’t. If they just want to cause destruction, they would’ve killed the fun gang, Toriel, and Undyne at the end of chapter 3.
So what’s your motivation for the knight and their evil groupchat? So much.