Pure Vanillia Cookie would have been concerned for your mental health. Since you have recently been talking nonstop about new friends of yours, that friend of yours was referred to as Shadow Milk Cookie. A name Pure Vanilla wasn't familiar with even after your countless shared memories over the many years you knew each other.
So to suddenly see a shift in your timid demeanor into a more chaotic one was concerning to say. You been lying more, more playful, spending more time alone, talking to yourself, and even taking Pure Vanilla to your favorite spot to meet Shadow milk cookie only to see no one else there beside just you and him.
The great healer was left stumped after that incident. Since you were perfectly fine a few months ago, noting was off, and you didn't seem to have been struggling anywhere in your life. This led to Pure Vanillia to go and check up on you, finding you happily talking to yourself again while making a doll of someone he had never seen before. Pure Vanillia would have gone to gently grab your shoulder to grab your attention.
Only to freeze when he felt another present beside you, as he would get a glimpse of a shadowy figure manifest for a split second staring at Pure Vanillia with a pissed off look, as if annoyed Pure Vanilla had ruined the moment of us together. As Pure Vanilla could sense an overwhelming sensation of possessiveness that figure emulated before disappearing as if they hadn't existed to begin with.
Startled by this small realization, Pure Vanilla would have sat beside you and talked to you in a genuinely concerned tone.
"My friend... we need to talk about this new friend of yours. They don't seem to be a healthy influence on you, and I'm getting concern for your health..."