Keeper of Secret Identity

Those who hide their real identity to protect the people they love and/or protect the city without others knowing who they really are.

They also choose to keep their real identity a secret to help maintain a normal life to avoid any repercussions, which is due to the unintentional collateral damage they are involved with, as it can lead to legal ramifications, pressure, or public scrutiny.

Although Superheroes are commonly known to keep secretive identities, this category does not only apply to them, as there could be regular citizens or other characters that have other things to hide from or lie about, such as Dr. Dave from 101 Dalmatian Street pretending to be the owner of Delilah Dalmatian and some of her Dogs and Pups saving them from being taken by Pest Control if they found out that Doug and Delilah Dalmatian live just by themselves without an owner and Firefly who goes under her mech SAM while serving the Stellar on Hunters.

This type of hero can be considered the heroic counterpart to the Alter-Ego of a villain.

There have been many Keeper of Secret Identities that count as Pure Good like Superman and Spider-Man. However, that really depends if they have their moral codes and don't have any corrupting factors that could prohibit themselves from being considered Pure Good.