Warhammer: I Just Became a Grey Knight, and the Greater Demon Calls Me Dad

I, Su Mu, transmigrated, but I'm playing an ultra-realistic life simulation game.

From the start, I play as the [Grey Knights], and the System even gave me a [Spirit Pet System].

[Ding! Matching an SSS-rank starting spirit pet for the Host... Match successful!]

[Spirit Pet: Father of Plagues · Ku'gath]

[Quality: Mythical (can grow)]

[Traits: Corrosion of All Things, A Father's Love (loyalty to the Host permanently locked at MAX)]

Before I could even react, a huge demon covered in oozing sores pounced on me and wrapped its arms around my leg. “Daddy!”

Me: “???”

Later, the System's mission was for me to cleanse Chaos.

Then Khorne, Blood God, came running over with an axe. “Father, whose skull do you want? Your son will offer it to you right away!”

Tzeentch, the Master of Change, unfurled a scroll. “Father, your fate was decided long ago. All change converges, and you will eventually become king!”

Me, on the verge of a breakdown: “No, I just want to play my game in peace!”

[System notification: Congratulations, Host, on earning the title [The Warp's Favorite]. Affinity with the Chaos Gods +10086! The Emperor's attention +999!]

Looking at the Greater Daemons and Primarchs behind me, all calling me “Dad,” then at the Inquisition's black gun barrels pointed my way, I was done for.