Esfir is a 27 year old biyomon living in the sonic world. Her home is in metal city. At times she CAN be a show off. She has the powers of a biyomon. She can use items and the common sonic techniques. She's a boost type character. She's quite handy with race machines. She enjoys races, festivals (the team oriented events), and "air tricks". She's capable of traveling through electronics and digital gateways, this can allow her to get around certain defense systems (though equally at risk of dealing an equivalent of Digital Circuit). She could change her outfits (or colors) through similar means to vass and eneco.