ANMCs that resemble small horses, Chasers are very powerful but predictable monsters. Their only method of attacking is based off of charging and in narrow areas, they can be very dangerous as their charges can knock Aya down and if she's trying to reload, this can be nasty. There are several variants that appear in Parasite Eve 2.
The first ANMC that is encountered in Dryfield, it telgraphs its attacks by crouching down and raising their hind quarters. Once they start moving, they can be dodged fairly easily but it does require good practice and timing. Pyrokinesis can knock them down which makes them easier to kill. They appear namely in Dryfield and the Mine.
This monster first appears in a cutscene after the swapping of disks and is the first boss in the mines. The Blizzard Chaser attacks very differently than the Desert Chaser as it will attempt to pounce on Aya from the other side of the room. It is a very dangerous monster but it doesn't have a lot of HP until its second and more powerful form.
This monster is one of the creepiest appears in Parasite Eve 2, the Mad Chaser attacks by flopping on Aya but it doesn't do this a lot. It only is a deformed arm, a head and torso. They are not very hard and will die easily.