1069. Why do these five characters all seem so reflective? 開 関 美 兄 童

Answer:

They all look the same when reflected in a mirror!

開  KAI, hira(ku), a(ku) - open, develop

関  KAN, seki - barrier

美  BI, MI, utsuku(shii) - beautiful, beauty

兄  KEI, KYOU, ani - older brother

童  DOU, warabe - child