Teasers are from YouTube Shorts from the @hololivedreams channel. In left-to-right order they are:

• Calli
• Kiara
• Ina
• Iofi
• Moona
• Risu
• AZKi
• Miko
• Suisei
• Roboco
• Sora

A few more have been added since I took the screenshot, you can check them out here!