Hatsune Miku!

Hatsune Miku doesn't have an "official" or fixed personality, as she was designed as a 16-year-old virtual diva (158 cm, 42 kg) whose character is defined by music producers and fans. She is generally portrayed as cheerful, energetic, hardworking, and kind, though her demeanor can range from sweet to capricious depending on the song.

Here we detail the key aspects of their personality:
Common Image (Fan-canon): She is usually kind, sweet, hardworking, and compassionate. Sometimes she is portrayed as a bit childish or capricious, with the leek being her characteristic object.

Versatility (Vocaloid): Miku is an instrument. Her personality changes radically depending on the song; she can be a sweet idol in a pop song and a tragic or cruel figure in dark ballads.

Hatsune Miku is a 16-year-old virtual singer, characterized by her long cyan/turquoise hair styled in two pigtails, eyes of the same color, and fair skin. Her iconic design includes a futuristic outfit: a sleeveless gray blouse, a pleated skirt, a turquoise tie, black boots, and cyan bracelets.

Physical Traits: She is a slender young woman, 158 cm tall and weighing 42 kg, with an anime aesthetic.
Classic Attire: Wear a gray sleeveless shirt with cyan details, a matching tie, and a black pleated skirt with cyan details.
Accessories: He wears futuristic headphones over his ears and detachable black sleeves that cover from his forearm to his wrist.
Distinctive Details: On his left arm he has a red tattoo with the number "01". His signature cyan color was inspired by Yamaha synthesizers.
Icon: Often associated with a leek (or spring onion), popularized by internet memes.

Miku Hatsune (CV01 / 初音ミク Hatsune Miku?) known mostly as Hatsune Miku or simply Miku, is a virtual singer for the synthesizer developed by Yamaha, VOCALOID2, VOCALOID3 and VOCALOID4, as well as for the program developed by Crypton Future Media, Piapro Studio. Her image, of a 16-year-old moe anthropomorphism girl, comes to be considered and personified as one of the most famous Japanese virtual idols worldwide, developed by Crypton Future Media with the voice of the seiyuu Saki Fujita for the second version of the VOCALOID voice synthesizer program. Her name comes from Japanese and its meaning is: The first sound of the future (初めての音 = Hajimete no Oto). The name comes from the reduction from "Hajimete no Oto" to "Hatsu oto" (初音) (or "Hatsu ne" in another pronunciation of the kanji 音) (sound) and Mirai to Miku.