"just imagine me to be your only reader in existence...because i'll never be dissapointed in you"

Being the MC, Mila has a very deep connection with Cordelia, being the one to push her to publish her fanfiction, Cora prides herself in being Milas first and most dedicated reader, she can be a tad bit intensive when she's with her sensei, getting jealous whenever someone else shows affection towards Mila. She greatly encourages Mila in her writing endeavors, always being the first one to read her fanfics and leave a comment. When Mila gets lazy, Cora is always there to motivate her, overtime, Mila has gotten accustomed to showing Cora her writing first before publishing it.

Spoilers

If you get her ending, its revealed that she actually used to follow Mila on her old account, she had always been her favorite writer, but after a controversy Mila got into that let her deactivating all her accounts and not posting anymore, so Cordelia stalked Mila until finally deciding to appear in her life and push her to write again.
"If I said that I had been watching you, collecting your information, and finally decided to appear in your life, just for this selfish purpose - to see your writing again. Would you... hate me?"