Randulph does not show much emotion and often maintains a stoic composure. As the chairman of the Hirahara Corporation, he carries himself with class and sophistication. (A point he has impressed on Kousuke and Yeong-Gi several times) As befitting a man of his status, he is seen to be even-tempered as even when talked down to by Shin-Ae rather abrasively, he barely reacted. A clear contrast in his treatment towards his sons may be drawn: while critical with great expectations, he is noticeably more mellow towards Kousuke as opposed to Nol, who is often the outlet of his chagrin as he fails to measure up to his expectations. The reason for this contrast is yet to be revealed. He also gives criticism and praise when due, as seen when he chided Kousuke (despite him being the "favored son") for his ungentlemanly etiquette when Shin-Ae and he fell on the floor without him helping her up.

There are many aspects to his personality that remain shrouded. (Much like the rest of his family)