No. She is just a fanmade Vocal with Miku and Rin's voice.
Neru is a fan-made derived character of Miku Hatsune so technically she is not a true Vocaloid. She does not have her own voice library and instead, many users use an altered pitch and tone Miku to represent her voice, and in some cases, Rin.
She's a fanmade spinoff of Miku, made by editing Miku's voice, like Mikuo or Zatsune. So, fanmade vocaloid but not an UTAU.
Maybe as a sister like Rin (Sometimes Rin more), It depends because people make him like Neru or Rin, but yes he loves Miku (as a sister or maybe not.)
'Pattern'...as in ? Anyway, Akita Neru is not a Vocaloid. She is a BOUKAloid. Technically, she's a fanmade Vocaloid based off of Hatsune Miku. But back to the main idea...what do you mean 'pattern' ?um...... to Let You Know Neru Akita is Not a Fan Made Charther she is a a Real Charther her number is 02 and she is in Project Diva and Her Voice is Not Miku she has her own voice some fun girls or so like to use mikus as neru voice and she has a lot of coustumes just wanted to let you know >.<
Lamaze-P (ラマーズP) wrote it.
The Vocaloids who appear are Meiko Sakine who is basically a younger version of MEIKO. Rin and Len Kagamine, Miku Hatsune, KAITO, and Yowane Haku. There is also Teto Kasane an UTAUloid, and Neru Akita a popular fanmade.
Kaito's sleeves always cover his, Gakupo, Gumi, and I think Haku aren't actually vocaloids so they have no number. Meiko is 00, Miku is 01, Rin and Len are 02, and Luka is 03.
Akita Neru has a little brother named Nero or in some places Naru.
Well, if your going in chronilogical order it goes: First generation vocaloids (MEIKO, KAITO, ...etc) Second generation vocaloids (Miku, Rin, Len, Luka...etc) Utauloids or UTAU's (Teto, Neru, ...etc)
neru
miku hatsune