(Note: I like to ignore canon ages sometimes, especially with UTAUs...)
-Engloids-
◾Sweet ANN -38
◾BIG AL -40
◾OLIVER -12*
◾YOHIOloid-17*
◾RUBY -18
◾LEON -32
◾LOLA -32
◾MIRIAM -34
◾Prima -41
◾SONiKA -17*
◾Tonio -40
◾AVANNA -18*
◾DEX -19
◾DAINA -19
◾CYBER DIVA -20
-Esploids-
◾Bruno-23
◾Clara -24
◾MAIKA -19*
-J-loids-
◾IA -17
◾SF-A2 miki-20 (Idk why I see her as this....)
◾Kaai Yuki -9*
◾Hiyama Kiyoteru -22*
◾Nekomura Iroha -13
◾Yuzuki Yukari-18*
◾Tohoku Zunko -17*
◾Macne Nana -15***
◾Macne Petit -10*
◾MEIKO-22
◾KAITO -21
◾Hatsune Miku -16*
◾Kagamine Rin & Len -14*
◾Megurine Luka-20*
◾Tone Rion -16*
◾MAYU -15*
◾Aoki Lapis - 1000 years old but looks 15
◾Merli - 2000 years old but looks 19****
◾Kamui Gakupo-22
◾GUMI -16**
◾Lily -18
◾Ryuto -7
◾CUL -17
◾galaco -16
◾kokone -14
◾Chika -19
◾Utatane Piko-15
◾VY1 Mizki-21
◾VY2 Yuma-19
◾Mew -21
◾ZOLA PROJECT -> YUU, KYO, WIL-16,17,19
◾anon & kanon -18*
◾flower -19
◾Sachiko -19
◾ARSLOID -19
◾Unity-chan -> Otori Kohaku -17*
◾Fukase -13
◾Rana-14 but she says she's 0 for kicks
◾Akikoloid-chan/Akikoroid-chan-21
-C-Loids-
◾Xin Hua -16
◾Zhanyin Lorra -163, looks 16 in appearance*
◾Stardust -> Xingchen-18
◾Luo Tianyi -15*
◾YANHE-17*
◾Yuezheng Ling -16*
◾Yuezheng Longya -23*
-K-Loids-
◾SeeU-17*
◾UNI-18*
-More famous UTAUs-
◾Defoko-15
◾Momone Momo-16
◾Kasane Teto-15 (sorry can't think of her as 31)
◾Kasane Ted-18 (I like to think of him as Teto's big brother)
◾Rook-19
◾Yokune Ruko-19
◾Namine Ritsu-6*
◾Ooka Miko-4
*canon
**confirmed by Internet Co. to be teenaged
***confirmed to be 14-15
***confirmed to be older than Lapis