The line comes from Dobrynya, the famous bogatyr of Russian folklore who appears in many animated retellings of epic tales. In this clip his surprised question has been lifted out of context and shared as a standalone reaction sound in Russian speaking meme spaces. Because the wording is simple and the delivery is theatrical, editors reuse it whenever someone unfamiliar appears on screen. It has spread through short videos, chats and soundboards as a quick way to question an entrance without adding any explanation of your own at all.
About this sound
Russian meme voice clip of Dobrynya exclaiming Oh, who is that, used for surprise reveals, unexpected entrances and funny reaction edits online.
This is a short Russian voice line where Dobrynya reacts with a surprised Oh, who is that. The delivery is loud, curious and slightly suspicious, as if a stranger has just walked into the scene unannounced. At just over a second and a half, the phrase lands instantly and leaves no doubt about the mood. It works because the question feels both heroic and nosy, turning an ordinary entrance into a small dramatic event. Viewers who know the character recognise the tone right away, while others still read the surprise from the voice alone.