Kaffin has two younger sisters. One of them is Qinthara, who is currently studying dentistry. Qinthara often spends time with Kaffin. One thing Kaffin is often curious about is what Qinthara learns in her college lectures. Qinthara happily introduces Kaffin to dental tools, explaining their functions and how to use them. Interestingly, since that conversation took place, Kaffin is no longer afraid to visit the dentist.