Takumu Mayuzumi

Birthdate: April 2, 2033
Age: 13
Class: Year 1 Middle School - 7th Grade
Height: 170 cm (5'6")
Weight: 56 kg
Legion: Nega Nebulus
School: Umesato Junior High School
Level: 5
Avatar:
Cyan Pile
Chiyuri's boyfriend. He is excellent at academics and athletics. He attends a famous school that goes from elementary to high school. Takumu is friendly with Chiyu and Haru and was seen to be nice and well-mannered. Haru looked up to him as a role model and mentor whenever they battle in Accel World together. He is seen to be wise and knowledgeable when it comes to the Brain Burst program and during battles were he is able to deduce the most sensible strategy. After joining Nega Nebulus, he calls Kuroyukihime "master" as a sign of respect. His caring way has him trying to stop or resolve arguments which is usually between Kuroyukihime and Yuniko. However, his knowledgeability and kindness is also where some people such as Yuniko or Kuroyukihime allows them to make jokes or insults towards him like calling "professor" or "four-eyes." He takes these seriously and becomes depressed.

His other name is a spoiler. Please stop adding it.

It is revealed that Taku is Cyan Pile, and the reason for him being good in school and in kendo is that he uses the Brain Burst program to cheat.