AI companion
An AI companion is an app you talk with over time as a friend, roleplay partner, or girlfriend. It is the wider category around AI girlfriend apps.
An AI companion is an app with someone in it you keep talking to on purpose. It can be a friend, a roleplay partner, or a girlfriend, so the word is wider than AI girlfriend.
Replika, Nomi, and Kindroid usually describe themselves as companions, and character catalogs belong in the same group. ChatGPT can play the part in a chat, though it started out as an assistant.
If what you want is one relationship where she remembers your life, sends you photos and goes on dates with you, look for a girlfriend app. Riho is that. The guide on girlfriend vs companion goes through the difference.