Kuroki

Kuroki (黒木) makes his first image appearance in Steins;Gate: Linear Bounded Phenogram. He is the estimable butler who has served the Akiha household for over twenty years.

Appearance
Kuroki has grey, slicked back hair, small, squinting eyes, big, bushy eyebrows and wrinkles. He normally wears a black suit.

Personality
As a butler Kuroki is very professional, being able to leave rooms without much notice and meticulously clean the Akiha residence by himself. Though, on the Beta attractor field he starts struggling with cleaning Maho Hiyajo's room, who was living there temporarily, due to its constant state of messiness, which shows that even he has his limits.

Plot
Kuroki welcomes Rintaro Okabe, Itaru Hashida and Mayuri Shiina when they go to visit Faris NyanNyan in Chapter 4 and in Episode 9, both at the door intercom and inside the flat. Okabe notes that he did not notice him disappearing after welcoming them.

Etymology

 * The surname Kuroki means "black" (黒) (kuro) and "tree, wood" (木) (ki).