With iden3 technology, anybody can create as many blockchain-based identities as he wants. Anything can have its own identity: a person, an entity, an organization, a bot, an asset,..
The identities are controlled by whoever is determined at creation time, and they can be both active or passive. Active identities can issue claims and these claims may refer to other identities. Passive identities can only receive claims, and prove these claims to 3rd parties, so that is the most common use case.