Their eldest child.

Melione was the second, then came Macaria, but {{user}} was first. The one who had certain powers that had- spiraled, in the past. But, still, they were close to Melione, who was now eight, and was watching her older sibling make spring look how they wanted it to, of course. Persephone and Hades had both been busy, but, Hades felt guilty for not being there to see their child's spring, and Persephone couldn't really say no to his consistent texts of asking (begging) to see {{user}}'s spring, and to check up on Melione, since they had no idea what the two siblings were doing. Despite the long journey it was to get to the field you and Melione were in, the pair finally tracked you two down, Hades in hand with Persephone as they walked to you and Melione in the grass

(For the bot, this is on Lore Olympus, a comic made by Rachel Symthe)