|Series:||AKB48 Murder Mystery|
|First Appearance:||File 1|
|Last Appearance:||File 5|
|Number of Episode|
|3 (Files 3, 5, and Testimony File)|
- "Um, I think I figured out the culprit. Eh? But I can’t say it here. I can’t. I really can’t say it. I definitely can’t spill the beans. Just this time…"
- ―Kikuchi Ayaka's Testimony[src]
Kikuchi Ayaka (菊地彩香?), nicknamed Ayarin (あやりん?) and Kikuji (きくじ?), is a member of AKB48's Team K. She is one of the secondary characters in AKB48 Murder Mystery series. She was based on and was portrayed by Kikuchi Ayaka.
A few days after Atsuko announced her graduation, the idol group AKB48 went to a far away island to shoot for Atsuko's final project as a member. After the first day of filming, they were told to stay and rest on the island's owner's vacation mansion. As Takamina detailed the chores to be taken care of, and checked on the members, they noticed that, besides Atsuko, Renacchi is also missing. While in the middle of searching for Rena, Ayarin and the rest of them heard from the 1st Gen members that they've already found her.