The 2019 version of Yuki Miku. The theme of the design contest for this year was "Princess" showing the imagery of Hokkaido winter.
Her fan nickname is also simply "Princess" (プリンセス).
The winning entry was done by LF and features a Western-style outfit with a blue and white strapless frilled dress, puffy detached sleeves, white cape, crystal earrings and studs on her hair, and a tiara. She wields a crystal scepter.
Her theme song is Ai by DECO*27.
This tag implicates yuki_miku (learn more).