Lex still remembered the first time he met Kenta's adopted father. The man did not exude any of the nobility or dignity one would assume a Celestial Immortal had. Instead, the man sat with Lex and ate ramen while Kenta complained about not wanting to get married.[1]
Spoiler alert, he eventually did get married even though he did not attend his own wedding, but that was irrelevant to the story. Lex remembered that Kenta introduced him as 'old geezer', and since then had called him nothing else. Lex later learned his name from other sources, but officially the man had never been introduced.
Lex could call him Mr. Haru, since he was Kenta's father, but he felt like the geezer was frank enough that Lex could get away with calling him old geezer.
