Mako Nagone (和音マコ) is an UTAUloid and one of the first UTAUloids to own a NIAONiao voicebank through import and/or created for the program. She sings in Japanese and her NiaoNIAO JP voicebank's current version is 1.0. She's a ninja and was voiced by makonaka, and created by kenchan. She started as an UTAU on the 20th of August 2008. It is unknown if she will be updated again.
You can learn more about her character here.