Question: how to add someone i blocked on snapchat?
Answer: Open Snapchat and tap your Bitmoji or username in the upper-left corner of the screen.
Tap the gear icon in the upper-right corner to access Settings.
Swipe up to see the Account Actions section, then tap Blocked.
You'll see a list of usernames of people you blocked. ... 
Snapchat prompts you to confirm.