Practical use
- Treat purple hearts as a status marker first: the creature is already charmed, not a secret damage buff or an achievement cue.
- A July 22, 2026 Steam answer names Krabaroo and Hatbirb as public examples, and the same thread adds Krabken as another source that can spawn charmed enemies.
- If the screen is crowded, slow down before swinging through your own pack; social runs are easier to read when Darwin keeps spacing and one personal win condition.
- Use the icon to decide whether to protect the ally, leave it working, or avoid accidental friendly fire while boss pressure is high.
- If the question is really about yellow stat pop-ups or ally bonuses falling off, open the social-upkeep page next.