Kyosuke is his first name, Higuchi is his last name. In the series, he is referred to as Higuchi. People (not fictional characters, but real people) can call him whatever they please, seeing as both names belong to the same man. It is simply a matter of personal preference that one may call some characters by first name and others by surname.
No there are not any characters called tegan.
Disney Characters
Round characters.
a characters thoughts and feelings is called direct characterization
The last song to play during the main part of the film is an original composition for the movie called "Cloud Smiles." However, two pieces are played during the ending credits, the first is a compilation of music from the original game and the second, the one with lyrics, is called "Calling," by an artist named Kyosuke Himuro. In the Japanese version of Advent Children Complete, the song "Calling" is replaced with "Safe and Sound", by Kyosuke Himuro and Gerard Way.
dynamicdynamic characters
A person in a story is called a character. Characters can be protagonists, antagonists, or supporting characters who drive the plot and interact with each other to create the narrative.
A person who draws characters is called a cartoonist.
characters
They're usually just called characters, but a character that is played by a human can be called an "avatar", which is a digital representaion of oneself.
What Characters That Are Somewhat Thicker And Darker Than Others Are Called
the answer is called the sum...is that what you were asking?