Source: Leaguepedia
KT replace Aiming with Jiwoo, MKOI promote NightSlayer on July 30
TL;DR
KT changed its bot lane on July 30, bringing in Jiwoo and parting ways with Aiming. In EMEA, MKOI added top laner NightSlayer from its academy roster.
KT made the larger confirmed change on July 30, replacing Aiming in the bot lane with Jiwoo. The organization announced Jiwoo as its new bot laner and confirmed Aiming's departure the same day.
That gives KT a direct one-for-one change at ADC, with Jiwoo joining the active setup and Aiming leaving the roster. No further details about the move were provided in the roster update.
MKOI's move was smaller but still clear. The EMEA organization brought in top laner NightSlayer from its academy roster, adding an internal promotion to its July 30 changes.
NightSlayer is confirmed as joining MKOI from the academy side, and the listed role is top lane. The update did not include any other MKOI departures alongside his arrival.