In this form, Castform is more calm and mellow. Rainy Castform is the more introverted and conservative form of Castform, yet they can still be sweet and cuddly with a partner. Due to its water typing, Rainy Castform has the most wet and lubricated insides. They are more submissive forms, but may take an active role as a power bottom with a partner they particularly like and trust. They have an especially strong affinity for wet, messy sex in the rain.

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