Soto is the Apex Dragon of Sound originating from the Dragon's World multiverse; she is a fun loving individual and interacts with mortal Dragons a lot, being the most well known of the Apex Dragons. She is also a good friend of Yumeko, in fact she's pretty much Yumeko’s only real friend and is the first one who joined Yumeko’s team.
Soto measures in at 34 meters/111 feet long and 14 meters/45 feet tall, with a wingspan of 43 meters/141 feet and a weight of 348 kilograms/767 feet.