On 2 April, Sumire did the first birthday stream. On 15 March, Sumire did celebration stream her channel reached 100,000 subscribers, she also reveal new 2D Costume. The stream ended after more that 5 hours. She accompanied by Noah to reach her goal. On 21 November, Sumire did endurance Apex stream 200 kill to celebrate her 50,000 subscribers. On 7 November, Sumire did talk and drawing stream to celebrate her channel reached 50,000 subscribers. On 11 October, Sumire did 2nd Anniversary stream with her sister Nazuna. On 28 August, Sumire did talk stream with her friend in Discord to celebrate her channel reached 30,000 subscribers. On 12 July, Sumire did reading marshmallow QnA stream to celebrate her channel reached 20,000 subscribers. On 1 May, Sumire released her first cover song ' Religion of Loneliness.' On 25 April, Sumire announces her new 2D outfit. On 8 September, Almost one year after debut, Sumire did endurance PUBG stream to finish match in 30 minute to celebrate her channel reached 8000 Subscribers. On 8 March, Sumire did PUBG custom with viewer to celebrate her channel reached 5000 subscribers. On 1 January, Sumire with her sister Nazuna doing New Year Stream with full 3D body in Nazuna's channel. On 26 December, Sumire and Nazuna announced their 3D outfit during a PUBG stream. Her YouTube channel was created on 21 September and her debut stream was on 11 October in Nazuna's channel. Sumire's Twitter account was created on September 2018, while her first tweet was made on 21 September. On her fingers she wears black nail polish. At the waist there is a flower decoration with a butterfly hanger. Sumire wears an idol dress with black purple white saturation studded with stars which makes her very pretty.

Besides that she wear the butterfly necklace. On her ears she wears butterfly earrings.

On her hair she wears a black ribbon decoration with cherry blossoms. Sumire's original design has the appearance of an idol. In FPS games, she plays with a great sense of exhilaration by utilizing her natural aim. She is usually calm, but has an innocent side in front of her sister, Nazuna. Sumire is an older sister of the Kaga sisters.

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