Arcadia Bay is populated by a diverse cast of supporting characters, each with their own stories and connections to Chloe and Rachel. Your interactions with them, even minor ones, can have subtle impacts on the narrative and provide additional context to the world.

- David Madsen: Chloe's stepfather. A former military man, he struggles to connect with Chloe. Your choices determine the level of animosity or eventual understanding between them.
- Frank Bowers: A local drug dealer with a complex moral compass. Your interactions with him can range from hostile to surprisingly empathetic, influencing his willingness to help or hinder Chloe.
- Steph Gingrich & Mikey North: Fellow Blackwell students and D&D enthusiasts. Optional interactions with them can lead to friendships and unique dialogue. Steph, in particular, is a fan favorite.
- James & Rose Amber: Rachel's parents. They present a facade of perfection, but harbor deep secrets. Your choices during interactions with them reveal their true nature and impact Rachel.
- Sera: A mysterious figure connected to Rachel's past. Your decisions regarding her fate are critical in Episode 3.
- Principal Wells: The head of Blackwell Academy. Your Backtalk challenges with him can affect Chloe's standing at school.
Paying attention to these characters and their stories enriches the overall experience and highlights the interconnectedness of Arcadia Bay.