Cloud

Cloud's core takes the form of cumulus clouds, but is the entity of all clouds in the sky. Because she is so vast, she thinks extremely highly of herself-and at the same time, because she's physically unstable and is an extension of Sea and other bodies of water, she is extremely insecure and is emotionally volatile as a result. She shares a close bond with Sea and Crescent Moon (thought not particularly close to his phases Full and New), but is extremely confused about her feelings for Sun-the resentment of a faraway superpower burning her away effortlessly clashes with the budding affection for a naive and genuine core.

fun fax:

--i have considered multiple cloud cores for each kind of cloud but there'd be too many and would reduce most of them to flat personalities
--Cloud's hair can evaporate and leave her entirely bald in the right conditions
--Cloud's bracelets are wearable lightning rods-they prevent her from accidentally striking herself and take enough energy so that struck objects/entities don't get significantly damaged