Point out one distinctive detail in this image that makes this "anime" artstyle

Fair play.

[SPOILER=Your image isn't anime, though, it's a muppet. It has blue hair.]

 Not anime, it has a ribbon, so it has to be a present.

 Not anime, it has round things, so it has to be a spirometer

 Not anime, it has black, so it has to be a dude wearing a cheap Grim Reaper costume

[SPOILER=Not anime, it has red pen marks on the face, therefore, it's a kid.]

In fact, it's not drawn at all, I exposed all my proof, and it leads to that conclusion. It was a trap question.

The challenge is to prove that it's "anime" art style, not disprove it. Thanks though.