>>46963261she happened to be in the right place at the right time when she saved him from the river, and since even wild Latis are typically highly empathic she kept an eye on him for a time in case he was accident-prone and was in danger again. He wasn't, but the more time she spent watching him the more she began to wish for a "domesticated" life under his care, as he deeply and genuinely cared for the pokémon he caught.