In a quaint, bustling marketplace on a sunny afternoon, a street performer named Kiyoshi stands motionless, painted in silver from head to toe, imitating a statue. He is facing a colorful, antique store, intensely gazing at the vintage items displayed in the window. Kiyoshi's positioning is such that the store is to the north of the town square and he is standing at the center of the square. Tourists weave in and out of the crowd, with their attention occasionally captured by Kiyoshi's brilliance.

To Kiyoshi's right, there is a lively cafe with outdoor seating, its entrance facing west, where a barista named Amara, known for her uncanny ability to remember faces, is serving coffee to the patrons while facing the square. From her vantage point, she can see a large portion of the square, including Kiyoshi. She observes the crowd, sometimes catching a glimpse of the reflection in the store windows opposite the cafe.

Behind Kiyoshi, several children are playing an impromptu game of tag, running in and around the market stalls set up with vibrant fabrics, souvenirs, and artisan crafts. One of these children, named Anouk, has a distinct red balloon tied to his wrist, which bobbed whimsically above the crowd, making him easily noticeable.

To Kiyoshi's left, a narrow alley cuts through the dense buildings, providing a shaded shortcut for the local pedestrians. In this alley, an artist named Zahara is leaning against the wall, sketching the scene of the square in her notepad. She has an unobstructed view of Kiyoshi and anyone coming through the alley from the east, but her line of sight to the rest of the square is partially blocked by the buildings.

Consider this moment in the marketplace. Based on the set-up, what can Kiyoshi see without moving his head? What parts of the scene can Amara observe while serving coffee? Can Zahara notice Anouk with the red balloon amongst the crowd from her position? Does Anouk have the vantage point to see Zahara sketching in the alley, and assuming the crowd isn't too dense, could Anouk see Kiyoshi as well?
Kiyoshi, positioned in the center of the town square and facing north towards the antique store, can observe everything directly ahead of him. The antique store's window displays, complete with various vintage items, fall within his focused field of vision. However, since Kiyoshi is standing erect and not moving his head, his peripheral vision would be limited to the areas immediately northeast and northwest of the square. Therefore, he would not be able to see activities happening directly to his right, left, or behind him without turning his head. This means he cannot see the cafe to the west, the alley to the east, or the children playing behind him. His view is solely fixed on the north side of the square and whatever enters his narrow peripheral scope from the northeast and northwest sides.

Amara, the barista at the cafe to Kiyoshi's right, is in a prime position for people-watching while she serves coffee. Given she is facing the square, Amara can likely see a significant portion of the marketplace, including Kiyoshi. She might catch sight of the children playing tag behind Kiyoshi, provided they pass within her range of vision. Amara can also see the customers entering and exiting the cafe and possibly some reflections in the store windows opposite, which could give her glimpses of activities happening on those sides of the square that are not directly in her line of sight.

Zahara, who is sketching in the alley to the left of Kiyoshi, has a perspective limited by the buildings that compose the alley's walls. She can see Kiyoshi clearly and anyone else passing through the alley from the east. Regarding Anouk with the red balloon, since the balloon rises above the crowd, if Anouk is within the eastern part of the square and the balloon is high enough, its color and motion might catch Zahara's attention. However, Zahara's view of Anouk himself -- that is, anything at crowd level or below -- would be obstructed by the surrounding buildings and people unless he comes closer to the alleyway.

As for Anouk, his ability to observe the square depends on where he is playing tag. If he is behind Kiyoshi with a dense crowd between them, his view of Zahara in the alley will be blocked by Kiyoshi, market stalls, and the other people in the square. However, if Anouk is near the edge of the crowd close to the alley, he could potentially glimpse Zahara leaning against the wall and sketching. Anouk's red balloon is likely visible throughout much of the square, but his direct line of sight to Kiyoshi would only be clear if the alleyway he is near lines up with Kiyoshi's position at the center of the square. If Anouk is close enough to the alley and the crowd isn't too thick, he might be able to see Kiyoshi from behind or the side, but not from Kiyoshi's front, where Kiyoshi's attention is fixated.