Flight 2024 Isane Kotetsu. She is the lieutenant of the soul society's fourth division in the gotei 13. Captain isane kotetsu's zanpakutō powers (speculation) so her zanpakutō is called itegumo (凍雲・frozen cloud).
And her zanpakutō release command is apparently flee (奔れ・hashire). She is the lieutenant of the soul society’s fourth division in the gotei 13.