This is what Welma actually looks like...she also has floaty hands but couldnt make them...if you don't know what she is like... I'll just write info about her here
Name: Welma
Species: Wither (Bedrock edition)
Age: N/A (she doesn't have a definite age..but her voice and way of talking can be compared to that of an 18-19 year old teenage girl)
Gender: Female
Health: 600
Personality: Friendly, Protective, ruthless, sometimes caring, affectionate towards friends
Powers: Regeneration (She regenerates 200 health in a second making it near impossible to kill her)

Can shoot wither skulls (normal, more explosive and special healing skulls to heal people around her…she can also spam shoot these wither skulls as if there is little to no cooldown)

Can respawn after death (even if u do kill her…she will just respawn as if she never died)

Has the ability of speech to better express herself

Is much smarter than most withers

Has floaty Hands to interact with stuff

Can destroy blocks with her touch (however she can control this ability so she doesn’t accidentally break anything)

Can summon an army of wither skeletons to aid her in battle

And lastly…her obvious ability to fly

so basically Welma is the most powerful wither to exist in UNMODDED Minecraft