忠實

忠 = 中 + 心 : Julian Giant Squid (zhu) plays darts every day in front of the engine ((e)ng1). He is very loyal (忠) to his club and even has a darts board (中) tattooed onto his heart (心).

实 = 头 + 宀 : Sherlock Holmes welcomes professor Skull just inside the entrance of the space station. Professor Skull has not a complete head but only a skull, and a solid understanding of solid state physics. She really is an honest person and still wears her graduation cap.