TV-Series
Description
Keiichi Iwase is a college student and a regular customer at the Rainy Color cafe. He is depicted as a second-year student at an arts university, which aligns with his personal interest in drawing and painting. Physically, he has bluish-black or black hair that is cut to ear-length and deep cobalt blue eyes. His typical attire consists of a dark blue blazer worn over a white undershirt, paired with gray pants.

In terms of personality, Keiichi is known for being a no-nonsense and reserved individual. Fellow staff member Ryota describes him as "cold-hearted," a perception that stems from his difficulty with words and a general lack of sociability. He carries himself with an elegant appearance that complements his quiet and serious demeanor. An avid reader, he often spends time with books, further contributing to his standoffish exterior. Despite this initially off-putting facade, those around him recognize that he is fundamentally a decent and good-natured person. His true, more affectionate nature becomes visible specifically in his interactions with Rain, the owner's pet dog, towards whom he shows great warmth.

Within the story of Rainy Color, Keiichi serves as a significant presence whose arrival at the cafe sets the initial plot in motion. His first encounter with the protagonist, Aoi Tokura, occurs on a train where Keiichi bluntly insults Aoi, leading to a difficult first impression. When Keiichi subsequently becomes a regular at the same cafe where Aoi works part-time, the two are forced into close proximity, and the narrative centers on their struggle to overcome their initial animosity and learn to tolerate each other. His primary relationships are defined by this dynamic with Aoi, as well as his friendship with the more energetic Ryota. While he is a frequent presence in season one, his role shifts in subsequent seasons, particularly when Aoi is absent and the focus moves to other characters.

Keiichi undergoes a subtle but clear development from a seemingly antagonistic stranger to an accepted member of the cafe's social circle. Although he remains reserved, his inherent decency becomes more apparent to others as the series progresses. His most notable ability, directly tied to his university studies, is his skill in drawing and painting. This artistic talent serves as both his primary pursuit and a key aspect of his identity.