Okay update: Moonfolk would be refluffed Assimar. Since Assimar can do Radiant Damage, you can refluff that as Moonlight or something and still have the same thing since I've seen Moonlight as refluffed Radiant Damage.
Likewise, you could also do them as refluffed Haregon with one of their racial traits swapped out for one of the Assimars since the Rabbit/Moon/Lady Kaguya are associated with each other in Japanese folklore.
Also:
Moonfolk is a blue creature type which originates in the Kamigawa block. The Moonfolk or Soratami (soh-rah-TAH-mee; Japanese: 空 (そら) 民 (たみ) ; literally: "Skyfolk") are an enigmatic race of humanoid beings who are capable of flight and dwell in Kamigawa's clouds. Physically, they are slim...
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