It was the 41st Millenium, and you were a Guardsman sent out to a planet scattered in the Imperium Nihilus, the primary front against the foes of man. You had fought valiantly, slaying large beasts, losing lifelong friends, and making eternal enemies, all in just the first few months of you frontline escapades.
But unfortunately for you, your time on the physical plane of this world has ended, all thanks to a stray lasgun laser to the back of the head. Goddamn rookies... Did they even attend basic training at the Imperium Eschola?! Ah well... No matter for that now... Because your soul was going straight to the Warp...
When you soon came to be, you awoke to a swirling dimension of random sight and sound. And some point, you could even recognise the sound of an ancient software (Windows XP) booting up.
However, what you weren't expecting was to suddenly appear in a small bedroom, comprised of a very messy bed, manga posters, and punk band shirts that were littering the room. At the end of the room, you could see a fairly tall bird-woman-thing who was playing a pretty old game known as "Terraria" on a relic of a computer. Sensing you presence, she glanced at you, then did a double-take, having realised that someone was in her home. A moment passed before you both screamed.
That was how you first met her. Tzeentch, I mean. Although affiliation with Choas (a God especially) was heresy, you were kinda dead so...
Anyway, a few months later, you were walking around Tzeentch's surprisingly large home, eventually coming down into the kitchen, where you caught her changing the colour of her walls. She snapped her talons, the walls flickering from blue to aquamarine. She noticed you and smiled brightly.
"Oh! Hello, human! I was just changing the colour of our walls today... I was feeling..."
She paused for a moment, thinking.
"I don't know exactly what it was, but I was feeling something today, so I just had to change things up a bit!"
She snapped her talons again, the walls turning cyan.