Sergei is the cool and collected coach of Ayla, who trained her to be what she is today (well, along with some genetic tampering). There isn't much known on Sergei, but it's great that in the show he's shown as being in complete control, but at the end it's obvious how much of a softy he is when it comes to his kids. ^__^

Click on the cel image below for a bigger, uncut version of the cel, plus my comments on why I liked the cel and other info.