Polka is known for her silliness and spunk. True to her nature as a circus performer, she is highly energetic and outgoing, and often speaks faster than even native Japanese viewers are capable of understanding. Her emotions fluctuate wildly: one moment she is extremely loud and energetic, and the next she is quiet and subdued.

Polka's streams are chaotic: she talks fast and loose, jumping quickly to and from a variety of topics. Even if she has a list of talking points, she quickly veers into related tangents, only returning to the original topic after a long time. Her unpredictability extends to how she plays games; this is more noticeable in open world games, like Minecraft and ARK, where she plays with a plan in mind which eventually gets abandoned in favor of doing something else entirely that catches her attention on the spot. Her in-game projects are often stalled by these distractions despite her intention to work hard on them, though when she does complete one it is after numerous adventurous detours.

As a natural-born joker, the only thing to be expected during her streams is unpredictability. In short, rather than simply being referred to as a clown, like she truly is, she’s more often called the entire circus by her fans. As seen on various of her streams and 3D performances, she has a distinctive laugh that can be compared to Pekora's. She also has an array of various instruments at her disposal (which include but are not limited to: bells, rotary phone, glockenspiel, vibraslap, and rubber chickens).

Despite these traits, she is often at the receiving end of pranks and teasing from fellow hololive members and her chat.

By her own account, Polka is easily affected by the weather, in particular atmospheric pressure. If she decides to stream on a day with low pressure, she almost always starts with less energy than usual; eventually she perks back up as she has fun doing whatever activity she is streaming.

"Eh? Where are you, dear~? Here you are~!"