Ashley (Heimdall) is a 5 stars Wind Fighter esper in Dislyte.

Ashley is turning out to be a very strong anti-cleaving esper due to her passive AP manipulation. Every time her team or herself gets hit by a critical hit, they get an AP push once every turn. This means if the enemy chooses to cleave, granted that there is no AP pushback from the opposing team, there is a potential to cut in and counter cleave or disrupt the cleave. Also, the enemy needs to crit for that to happen. Units like Tiye, Long Mian, Pritzker or Lucas usually don't have much crit, so there is a bit of RNG there. The second part of the passive is that if any of your ally crits, it also reduces the enemy AP.

Her S3 gives the entire team attack buff and gives def + shield buff to herself. Her S2 can apply attack down and also stun the enemy if they have less attack than her. Her S1 can apply speed down. Her kit is quite loaded and for me, she is an offensive version of Gabrielle.

It is best to build her with high speed and attack, granted that her s3 shield scales off her own attack. Having high speed also means that she has a much better chance to cut into enemy cleave teams in PvP.

However, she can also be built as a pure AoE DPS if needed.