User not showing up in admin panel but shows up in database. How do I remove?

We have a former user who does not show up on our administration panel.

And they do not show up in the API

However, they show up in the database.

This employee has been rehired but cannot log in. I need a way to get them back in the system to sync with AD. How can I delete them from the database to allow the user to rejoin and resync their account?