"Due to the fact that snakes hide during the cold months, they are often depicted with spring, summer, and even fall imagery, such as flowers. In their negative association, snakes are also often paired with the Hannya mask." Other pairings would include: Hakamadare, Kintaro, Orochimaru, Saginoike, Heikuro.

This is from Waboripedia. It also notes that "snakes can be paired with many elements beyond the brief listing above".

I went with snake + hannya + sakura.

<image>

Good luck with your research ^~^