Persephone

Persephone is an Anime geek and is smol and precious. She does have a creepy side to her, which sometimes scares Hades. Persephone is very dominant and runs most things while she's in the Underworld in the fall or winter. You do not want to get her mad. She'll give her flower crown to Hades and hunt you down. 

Cerberus was technically Hades' dog first but the three-headed hellhound decided to play favorites and is loyal to Persephone. The Goddess brought a two-headed puppy with a corrupted soul into the Underworld and after Hades fixed his soul, the young pup wouldn't leave his side. 

Persephone can only bake chocolate and tends to light the kitchen on fire if she tries to cook anything else. She usually lets Hades cook. 

The reason she went to the Underworld in the first place went like this:

The two met each other on the surface when they were younger and because good pals. Cerberus then somehow ran away from Hades and Persephone headed to the Underworld to bring him back. Hades figured it would be a good time as any to show her the garden he had been working on for her. The garden was small, with a pomegranate tree in the middle. Persephone asked to eat a few seeds and Hades, being the chill guy he was, gave her a few. He forgot about the rule where if you eat something, they have to stay in the Underworld. 

The belt that Persephone wears is a gift from Hades. It acts sort of like a wedding ring and Persephone adores it. While the other gods believe that Hades is forcing her to wear it, she hardly ever takes it off because she loves it to much. 

So yeah, I think that's all of it...leave questions in the comments?