Strikes for a few seconds and then fires off a powerful shockwave. The attack has a large area of effect. When she uses Continuous Swing, wait for her to unleash a fan-shaped strike and close in immediately. On the other hand, if she uses Continuous Shockwave, lure her to using the third shockwave and then charge for an attack of your own. Later in the battle, Data Larxene will create copies of herself which can overwhelm Sora with continuous attacks. Pick them off quickly to avoid taking too many hits.
Kingdom Hearts 3 (KH3) Re:Mind - Larxene Boss Guide (Limit Cut)
KH Character Files: Short Stories - Xigbar, Marluxia, Larxene - News - Kingdom Hearts Insider
Larxene is one of only two female members of the Organization, and has a very sadistic nature. She controls lightning, and uses it to thrash opponents with rapid attacks while also attacking them with her weapons: electrified throwing knives. She is one of the members stationed at Castle Oblivion during Kingdom Hearts Chain of Memories and is part of an internal struggle between the senior and rookie members. On an unknown world, Larxene's original persona, Elrena , became a Heartless, her strong will allowing her body to continue on as her Nobody, Larxene. Shortly after joining, she found Axel and engaged in a conversation with him. She asked him how she looked in her new outfit, and when he did not produce a response, she took it as a sign that he found her unsatisfying to talk to. Axel explained that he was simply confused as to why she started talking to him for no reason and that it wasn't that he found her presence unappealing, he simply found it "nothing".
Larxene (No.12) Kingdom Hearts
Come theorise who the last three Princesses will be! Xigbar Story: The Fool. People lived in peace, bathed in the warmth of light. But then, people began to fight over the light, and as a result everything returned to the void.