List repeated phrases
Before designing, write down the phrases people already send: wait what, no, fine, I am crying, brb, good job, please, slay, okay, and not again.
Turn roles into characters
Every group has personalities: the planner, the late responder, the dramatic one, the helper, and the person who always reacts with memes. These roles can become sticker prompts.
Keep the pack friendly
Inside jokes should still be easy to understand and comfortable to send. Avoid jokes that only work once or require a long explanation.