The original source of this short clip is not documented, so it is best understood as a community-shared follow alert rather than a line from a known show or film. Sounds like this circulate on soundboards and streaming communities because they give channels a quick, recognisable way to celebrate new followers without interrupting a broadcast. Its uwu-style cuteness fits the playful, affectionate tone of many creator communities, and its sub-second length makes it easy to reuse across streams, shorts and reaction edits. That combination of brevity, charm and recognition is why it keeps appearing in follow and welcome moments online.