It was posted earlier but here it is again, from -
What to make of Yaroslav Askarov's trade request
"Askarov is a unicorn, in several ways. He plays aggressively and skates exceptionally well, almost like a smaller goalie, but has a larger goalie frame at 6-foot-4. He’s never out of a play, and consistently makes second and third-chance saves because of how well he remains composed, even in the most scrambly moments. He’s by far the most explosive goalie of any of the prospects watched for this exercise.
Askarov is also an emotional goalie and it impacts his game, which can be a positive and a negative. He gets fired up for certain opponents, he likes playing against other top goalie prospects, and he likes to celebrate big moments publicly. It also makes his struggles snowball a bit, and it’s why he’s lost the net at times in the AHL, with the coaching staff turning to a calmer, more composed veteran. If he can find some balance in his game, Askarov is going to be a surefire No. 1 in the NHL and could contend for Vezina Trophies if he lives up to his tools."
Tl;Dr: He is a great skater/edge work, athletic, with solid transitions and movement.