Xiaomi Security
com.miui.securitycenter
Removing the app may cause bootloops. It does not cause bootloops in Redmi Pad, but you will lose some functionality like the battery status/usage page, as well as the app usage/removal page.
Provides “protection and optimization tools”: App lock, Data usage, Security scan, Cleaner, Battery saver, Blocklist and other features. It is mostly a front-end (UI).