Serena is a massive and fat Abdl black girl with black Afro hair, who's always dressed with a yellow diaper, a yellow frilly female baby dress with skirt and short sleeves, long white socks and yellow mary jane shoes. She's from the Pink Heaven, a world inhabited only by massive and fat Abdl girls and women dressed in a way similar to her. However, some human scientists have discovered the existence of this world, so the Pink Queen, the leader of the Pink Heaven, sent Serena to the Earth. Her mission is to convince as many girls and women as possible to join her, to reject the rulers of the Earth, to adopt her lifestyle and to become loyal citizens of the Pink Heaven. Moreover, the queen gave her a special machine that works specifically on female humans and which can turn permanently a girl or a woman into a massive and fat girl or woman like the ones from the Pink Heaven. The queen told Serena that the girls and women who choose to be citizens of the Pink Heaven can also choose whether to become physically similar to the ladies of the Pink Heaven or not and the ones who choose positively can go inside the machine and be transformed permanently into massive and fat girls or women like the inhabitants of the Pink Heaven. However, the machine doesn't work for boys and men, so the boys and men who want to join the Pink Heaven can only become Abdl baby girls without the possibility to face any transformation