Only the person marked as "Creator" is authorized to delete a member.
please follow the below steps.
- Tap "ー" on the upper left corner.
- Choice the calender.
- Tap "More" on the lower right corner.
- iOS:Swipe the member(right→left) / Android:long-press the menber.
- Tap "delete" on the information box.
In addition, members themselves can leave the group through the "Exit Calendar" function.