Ragnarok's voice is always bold and in italics. Crona's is just in italics.
Crona's POV:
I hugged (Y/N) as she was sleeping soundly in my arms.
I found I couldn't go to sleep.
Then I heard Ragnarok's voice ring through my head.
Kill her.
Ragnarok stop it I like her!
This is the perfect time to kill her. She is asleep.
Stop it I can't deal with you giving me these thoughts.
She hates you. Just kill her now before she stabs you in the back and shatters your heart.
No.
Yes.
No.
YES.
STOP IT!
I shut my eyes really tight and brought (Y/N) closer to me in a tight, protective hug.
I will never give in my (Y/N)...I won't ever hurt you!
I have to protect you from my evil side.
Pretty much I have to keep you away from myself.