Artist.
Japanese name: 海野 悠 (Umino Haruka)
Old names: きゅ～た (Kyuuta) or 野球侍
https://www.pixiv.net/users/11029297
https://www.pixiv.net/users/20510051
https://www.pixiv.net/stacc/harukaumino6
https://www.pixiv.net/stacc/qqez7uv9k
https://twitter.com/Haruka_Umino6
https://twitter.com/qqq_ta
https://twitter.com/intent/user?user_id=2483233292
https://twitter.com/intent/user?user_id=784006518467203072
https://seiga.nicovideo.jp/user/illust/38971815
https://www.nicovideo.jp/user/38971815
https://sketch.pixiv.net/@harukaumino6