Title: Chatelaine of Herd Moonfairy
Sirena is a chocolate brown hippocampus/pegasus mare with yellow-orange glittering mane and wings. She has front hooves, but her hindquarters are a classic scaly fish tail.
Sirena can swim, breathe underwater, AND fly! She is presumably also able to move on land, perhaps using her wings in place of hind legs.
"Give your attention to the things that matter to you."