A clever opponent can beat them by tying their pony tails together.
The Bana have an initiation ceremony where those who seek out the Bana may join their number. However rather than just letting them join their given a secret test of character and if they join, their in. If they fail however, they get the special tea to forget they found the Bana, and wake up in a nice hotel with enough money to take em wherever they wanna go so long as its not Bana Mighdall.
This goes over Artemis's various abilities throughout Rebirth
Speed
Durability/Endurance
Strength
Equipment
Training and Combat Skill
https://comicvine.gamespot.com/artem...hread-1902054/