Subverted: Alice is seen carrying a pair of blades attached to the sides of her boots. However they are soon revealed to be a pair of standard knives that she uses on a conventional manner as emergency weapons and auxiliary tools.
...But on a particularly difficult fight, Alice attaches the knives to her boots' soles as a impromptu measure to improve her kicks damage.
Alternatively: Alice uses the knives normally... But she does happen to be wearing steel-toed cleats because she knew a fight would break out.
Alice can kick away her shoes to hit her opponents from incredibly long distances, after which they automatically return to reattach to her feet by themselves.
Alice's shoes shoes are stilettos.
Zig Zagged: Alice's combat training is comprehensive enough that she can vary her fighting style based on what (if anything) is on her feet.
Averted: Despite favoring a fighting style based on kicks, Alice doesn't wear special footwear to amplify her kicking power. In any case, a pair of resistant boots is good enough for her.
Enforced: "It was required for every playable character on the game to have a distinctive weapon, and with this hefty amount of characters, it was matter of time before we had to give someone the boot mounted blades."
Conversed: "I wonder if the gun ever goes off while she's running..."
Alice's weaponry malfunctions one day leaving her paralyzed from the waist down.
Alternatively, her footwear-centric fighting style leaves some glaringly obvious weaknesses, such as not being able to attack while in motion, that her enemies learn to exploit.
She re-enters the team using mechanical legs and new weaponry
Alice knows where the weaknesses in her fighting style are, and continually works to anticipate how her opponents might try to take advantage of them so that she's prepared to counter whatever they try.