Okay what i used here on my wattpad story is i first start off by adding a chapter which identify their names and a POV of their names. if they want to switch i will be putting like for example if it's your POV and you want your character to switch while you are on your POV you can use this method.

HAYADINE: "i HATE YOU" i replied to him in my head while concentrating. "Then hate me no one cares!"

SIMPLE AS THAT. hayadine is my wattpad character

In Wattpad, I add a chapter, then enter my character's names and points-of-view.

I select a charater's name and then write what I imagine the character saying in response to another character or situation.

For example:

CHARACTER A: "I HATE YOU!"

CHARACTER B: "Then hate me! No one cares!"

It's that simple!