Teto and Miku

Kasane Teto (Japanese: 重音テト) is a virtual singer and voice bank for the program UTAU. The character was originally created as a joke for April Fool's Day in 2008 on the Japanese forum 2channel, but became a full-fledged voice bank later that year. Kasane Teto is officially stated to be 31 years old. In her original design, she was 159.5 cm tall and weighed 47 kg. She loves baguettes and has a tsundere personality. Kasane Teto is a perky, cheerful, and mischievous chimera with a bright, energetic, and slightly eccentric personality.
Main character traits
• Loves attention: She loves to be the center of attention, which is why she is sometimes considered self-absorbed or narcissistic.
• Impatience and enthusiasm: Can be impatient, noisy, boastful and overly energetic.
• Passion for bread: She is crazy about French baguettes with margarine; she can become very angry or upset if someone does not share food with her.
• Complexes and pride: She has an overwhelming sense of pride, but at the same time she sometimes has complexes about her age (she is 31 years old, which for a chimera is equivalent to approximately 15.5 human years)

Hatsune Miku (Japanese: 初音ミク, [hatsɯ̥ne miꜜkɯ]), officially codenamed CV01,[2][3] is a Vocaloid voice bank and software application developed by Crypton Future Media. Her voice is generated using sampled vocal sounds provided by Japanese voice actress Saki Fujita. The software is personified by an official mascot character depicting a 16-year-old girl with turquoise pigtails. Marketed as a virtual idol, Miku has performed at virtual concerts as an animated projection.
The character's name is formed by combining the Japanese words for "first" (初, hatsu), "sound" (音, ne), and "future" (ミク, miku)[a], meaning "first sound of the future"[2], which, along with her codename, refers to her position as the first in the Crypton "Voice Character Series" (abbreviated as "CV Series"), preceding Kagamine Rin/Len (codenamed CV02) and Megurine Luka (codenamed CV03). The number 01 can be seen on her left shoulder in official artwork. • Age and height: According to the program passport, she is 16 years old, 158 cm tall, and weighs 42 kg.
• Popular perception: In the fandom, she is most often seen as an energetic, cheerful, friendly, and sincere female idol who loves to sing and gets upset if the music stops.
• In songs and media: Her personality is completely dependent on the plot of a particular song, music video, or game (for example, in the Project SEKAI series, she plays a variety of roles, from a caring mentor to a street helper in a cafe).
• Symbols: Turquoise hair and green leeks have become an integral part of her recognizable image.