Mildfire

She comes down from Floopelf mountain,
on a dark, flat land she rides
on a pony she named Mildfire
with a whirlwind by her side
on a cold Capria night... 

Yes, that is how Bells named her stalwart steed, who is at least as silly as she is anyway so it all works out in the end. Unlike Treasure, who is reckless because she knows no fear, Mildfire is reckless because he really doesn't have enough sense for as much natural fear and caution as he ought to have by rights.