Petit Planet Officially Details Relationship System & AI Characters

Published Nov 9, 2026, 10:00 PM EST

Ben Brosofsky has been writing for Screen Rant since 2022 and editing since 2024. He graduated from Vanderbilt University with a Bachelor's in Cinema & Media Arts. Writing serves as a much-needed distraction from tackling a backlog of Steam games that will never be surmounted.

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Petit Planet is HoYoverse's answer to games like Animal Crossing, but it's not sticking to the basics of the Nintendo formula. True to the grand ambition of other HoYoverse titles like Genshin Impact and Honkai: Star Rail, it's incorporating a diverse array of features, including some that will be more familiar to fans of Harvest Moon or Stardew Valley.

One such mechanic is the relationship system, which tracks the development of relationships with Neighbors in a more tangible way than anything that happens in Animal Crossing. In a group interview last week, Petit Planet's lead game designer Murphy explained the relationship system to ScreenRant.

Petit Planet's relationships are tracked via an in-game constellation system, which offers up discrete rewards for attaining certain benchmarks with each Neighbor. It's not just about earning cash, though. According to Murphy, "as you develop closer relationships with certain neighbors, it will unlock more features and gameplay experiences for you."

The core idea behind it is increasing your personal influence with each neighbor, going from a generally passive observer to someone who can influence their tastes and aesthetic. With a strong enough relationship, players will be able to choose outfits for their Neighbors or decorate their homes. While it might seem like an undue amount of control, Murphy compares the concept to recommending outfits to close friends in real life.

Steady progress in this realm is a core part of the game, with Murphy describing "gradually establishing relationships with neighbors" as part of the replacement for the main story focus of other HoYoverse titles. Along the way, more of the Neighbors' individual stories will also become available, revealing their lives and personalities in greater depth. This does not, however, appear to be a game with any kind of romantic focus, and neighbor designs come across more as cute friends than as potential beaus.

Aside from all the bespoke NPCs, Petit Planet is also diving into more controversial technology with the implementation of some NPCs that use AI in a chat-bot-style approach. In this case, developing relationships will naturally lead to "more customized interaction." For those concerned about the environmental or ethical qualifications of this feature, HoYoverse is providing a toggle to turn off interactions with AI NPCs, paring the game down to its fully scripted characters and relationships.

Even without those characters, there should be plenty of interactions to appreciate in Petit Planet, as it features significantly more individual character writing than Animal Crossing's broader, personality-type approach permits. Just how many Neighbors will be available at launch has yet to be confirmed, and whatever the number is, it'll certainly grow over time.

Fans of HoYoverse games or cozy life sims will get to see the relationship system in action when Petit Planet launches on December 4 for PC and mobile devices, or in 2027 for the Nintendo Switch 2. For anyone planning on playing, best of luck figuring out the best gifts to get things moving.

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