The SD Unity-chan character model and the Unity-chan-derived character model attached to the package are subject to the Unity-chan license. Motion, scripts, and other assets are covered by the EULA license.
View Unity-chan license
View Asset Store EULA license
SD Unity-Chan Haon Custom uses the same format. You can check the format of this series with free assets.
▶ SD Unity-Chan Haon Custom Bundle
Check out the screenshots for model and texture information.
▶ Motion Data Spreadsheet - Seatname "WTD", "Default"