This is one of my favorite features of 1Password (no affiliation, but I've used them for 10+ years and am a fan). They have an identity section that you can use

This is one of my favorite features of 1Password (no affiliation, but I've used them for 10+ years and am a fan). They have an identity section that you can use to store all kinds of personas securely and even use the information to autocomplete forms. With the ability to add custom fields, you can easily store more than just the standard metadata like name, dob, etc.