Over 80 years old? Sure...

 

Name: Mikumo Kushinada, Youken no Urukiboshi/The Bewitching Fist
Origin: History's Strongest Disciple Kenichi
Gender: Female
Classification: Human Martial Artist
Age: Possibly well over 80 years old although she looks like she could be in her mid 20's to early 30's
Powers and Abilities: Super strength, speed, durability, endurance, uses the Sei-Type of Martial Arts (a user of this fights not with power or anger, but with talent, skills and wit), is a master of Jujitsu (the Kushinada style of Jujitsu she employs is unique as she utilizes no raw power at all meaning 0%, but rather focuses her style on 100% skill), can lift people up as if they have no mass (Kenichi described her technique as 'Zero Gravity'), can create 'shadows'/afterimages of herself, has a lengthened life span, ki manipulation (can use this to knock people out or mask her presence, can kill opponents with killing intent alone), ki detection, Rittoku No Kan (the user takes the five senses to the utmost limit and develops a sixth sense "Intuition" of "Perception". It allows the user to reduce their time needed for reacting to one tenth, used like a sensor to catch movements they can't follow with their eyes)
Weaknesses: None notable
Destructive Capacity: At least town level+ via powerscaling, likely higher
Range: Average human melee range
Speed: Hypersonic+ (is a Super Master Class fighter and was able to outmatch Kensei in speed, her speed was great enough to take on both Shigure and Sakaki at the same time in seperate places, Shō Kanō also didn't manage to hit her even once in his many attempts, also goes back with the Elder, like Elder is also able to run on water)
Durability: At least town level+ via powerscaling, likely higher
Lifting Strength: Class K+
Striking Strength: At least Class TJ+
Stamina: Large, is a master of her martial art, therefore rightfully she dwarfs any lower class fighter in the field
Standard Equipment: Nothing notable
Intelligence: Skilled combatant, is a master of Jujitsu
Notable Attacks/Techniques:

'Shadow' Creation: Mikumo can create shadows of herself that can interact with several different targets at a time.

Notable OBD Victories:

Notable OBD Losses:

Other: