Naomi Iska Japan
Osaka had a shy, reserved personality in her early years on the WTA Tour. Her former coach Sascha Bajin was initially confused by her personality, saying, "I thought she was a little bit more of a diva because she didn't talk much. She doesn't really look at someone's eyes, but that's just because she was always so shy ... Back then I didn't know for what reason."
Osaka is also very frank and is regarded as having a dry sense of humor. During her 2018 Indian Wells Open victory speech, she began by saying "Um, hello ... I'm Naom ... oh never mind" and later noted, "This is probably going to be the worst acceptance speech of all time" after being worried about forgetting whom to thank, and appearing to nearly forget to thank her opponent Daria Kasatkina as well as one of her sponsors.