This particular identifier appears to be a possessive noun phrase. The initial part likely refers to a specific online user identity, while the addition of “‘s” denotes ownership or association. For example, if “angel_from_sky” is an account name, “angel_from_sky’s” could refer to their creation, opinion, or property.
Understanding the role of possessive nouns is crucial for accurately interpreting online content and attributing information to its source. Properly identifying ownership ensures credit is given where due and avoids misrepresentation of viewpoints or intellectual property. Such precision is particularly valuable in contexts where accountability and provenance are paramount.