The girl in the red dress and the boy that is waving his hand at her will love each other when they grow up.
But destiny in this dark universe will ruin everything. Because he was recruited in the imperial guard, they will never see each other.
The sorrow will consume her and will transform her into a Slaanesh follower.
The next time the find each other, he wouldn't know what to do, because she tells him that she still loves him, and that she waited all those years for him in the warp, so they can live together for all eternity