Can a student remove Skie from the device admin list?
No. Skie is the device owner, not an ordinary admin app, and it cannot be switched off from Settings. Only an admin can release it, using Remove Skie from the dashboard, which turns off protections, shows every app again, restores DNS and releases ownership without deleting any apps.
On many Android phones there is a device admin list in security settings, and a user can untick an app to deactivate it. Skie is set as the device owner during provisioning, which is a stronger role that Android does not let the user remove.
The only way to end management is deliberate. An authorised admin uses Remove Skie in the dashboard. That turns off every protection, shows every app again, restores DNS and releases ownership. It does not delete any apps. It is also what you use when a tablet is being returned or retired, usually followed by a reset.
Related protections close the nearby routes. Uninstalling Skie is blocked, force stop, clear data and disable are blocked on managed apps, and the Skie app cannot be stopped by the user. Adding users, work profiles and switching users are blocked too, so a student cannot create a separate space without Skie.
Who can run Remove Skie? That depends on roles. Page access can be switched per role, so you can limit the action to the people who should have it, and the audit log records who did what.
Practical tip: keep Remove Skie for lifecycle steps, such as a device leaving the organisation, and use Replace a device when a tablet breaks, which keeps the student, group and history and frees the old seat.