Akita Neru is a Vocaloid Derivative. Her name (亞北ネル - Akita. Neru), in phonetic reading, sounds like "I quit. Going to sleep."
She started out as a meme on 2channel, where a troll user started threadcrapping all Vocaloid related threads. Some user commented that he wouldn't get angry only if the troll was a cute girl. Thus Akita Neru, a tsundere non-Vocaloid net-chara was born. Her image color is orange-ish yellow and her character item is a cell phone. Her design was created by Smith Hioka (スミス･ヒオカ) in 2007. Neru is sometimes written as a Miku wannabe, others as the anti-hero of the Vocaloid personage. She has been officially recognized as a Miku derivative by Crypton since 2008, and most vocal representations of Neru uses Miku's voicebank (though some producers use Rin's voicebank, ala NanameueP, and some fans use the phone noises from Triple Baka).
In the West, she's largely remembered for her appearance in Triple Baka. She would once more return to prominence in 2024 as a result of a meme relating to Mesmerizer, due to a reply to a tweet reminiscing about Triple Baka, where Neru was called "the yellow one that doesn't appear in Mesmerizer". The wave of Neru fanart that followed would culminate in SWAGAMICCHI's fan design for what Neru could've looked like in Mesmerizer.
