Mina Ashido is able to shoot acid from her body using her Quirk, Acid. This combines very well with her close combat approach to fighting and makes her a very real threat to her rivals.

Ashido's first ability is a Response that requires her to discard a card. It can only be used on her turn and only once per turn, but it allows her to play the card she just checked as her next form of the turn. While it is very random and has a real cost (discarding a card), but it is worth it since playing a card without making a check is very powerful.

Her other ability is a free Enhance that gives her attack one speed and restores one health if the attack deals damage. This will help Ashido make up for having such low health.

Now that Ashido has been training and refining her quirk, she is able to better utilize it when fighting both in close combat and from afar. This version of her captures these improvements by having her use both Punches and Ranged attacks.

Her static ability makes it so facedown cards in her card pool do not add to her progressive difficulty to play cards. Anytime a character can ignore progressive difficulty it is a powerful ability. This ability will be particularly useful since many of Ashido's cards will be adding themselves to her card pool facedown. 

The Response ability triggers when your Punch or Ranged attack deals damage and causes your rival to lose one health for each facedown card in your card pool! This ability combined with her static ability means her rivals better be careful or else they will be losing a lot of health anytime they don't block. 

Now that Mina has mastered her quirk, she is developing new ways to utilize it in combat. She still focuses on using Ranged and Slam attacks to make her rival lose health, however she also destroys their resources.

Her first ability is a Static ability that makes her Rival lose one health after her Ranged or Slam attack deals damage. This might not seem like a lot but it adds up over the course of a game. After 4 attacks deal damage, she will have done 4 additional damage. That's basically the equivalent to a fifth attack.

Her Enhance ability is really going to upset her rival. For cost she must commit and remove two face down cards from her card pool. The first trick is getting two face down cards into your card pool, but being able to remove them means that you won't have that additional two progressive difficulty on your forth card and beyond for the turn. By paying the costs your rival then destroys one ready foundation. While they do get to select the foundation, the fact it has to be a ready foundation means they are losing a resource they probably wanted to keep.