With Alexandra’s heavy Ballet practise in her childhood and teens, and continued admiration for the discipline, look, movement, and posture of a Ballerina, Alexandra had her tendons surgically shortened by Lumina, to modify her feet into a permanently fixed en-pointe position. From her shin, to her toes, it’s a straight line, forcing her to completely balance on her toes.
Furthermore, she had much of her heels of her feet removed, her legs becoming a smooth rod from her knees down, as the protrusion of her heels were completely gone.
She now has to walk on her toes at all times. Later on, her entire feet will get fixated into position further, to straighten down the does as well, resulting in her only contact with the floor, being the tip of her large toes, as even the toes stand vertical.
Once the entire transformation into a Bane is complete, Alexandra only walks on the tip of her latex toes, making basically no sound when walking. With the transition of her legs to her feet hidden by latex, her legs become like long poles with needle-point endings, without bend from the knees down.
With the special vertical boots of the armour, Alexandra’s en-pointe feet have taken up an even extremer arch, as now even the toes are fixed straight down. This transforms Alexandra’s legs into long poles with needle-point feet, only balancing on the tip of her big toes, as that remains the only contact with the floor she has.