Christmas kaomoji do not need a dedicated image. Stars, cozy animal faces, hugs, and celebratory arms already carry a warm seasonal tone.
Create a small holiday sign-off
Combine one face with a short divider or star trail:
Warm wishes from us (⌒▽⌒)☆ ⋆｡°✩Keep multi-line decorations in a monospaced block if alignment matters.