Iason's furniture who serves as the caretaker of Riki. He calls Riki "Sir Riki" and loves him because of his pride and not willing to bow down. Both came from Guardian orphanage when they were little. Daryl died in the novel because he let Riki escape, its unknown what happens to him in the Cd Drama probably sold someplace else. Like Katze, Daryl is a furniture that is intelligent for hacking the system. In the 1993 drama CD, he is played by Ryōtarō Okiayu. In the later drama CDs, he is played by Eiji Hanawa. He is from the novel.   (Source: Wikipedia) 

The story is set in the future on the planet named Amoi which is controlled by a supercomputer named Jupiter. Among the mostly male human population, the light-haired elite class is allowed to temporarily keep the dark-haired "mongrels" as pets. One elite member, Iason, encounters a mongrel named Riki in the slums and decides to take him in. However, Iason keeps Riki longer than it is socially approved, and rumors abound about their possible relationship.

In the future, on a distant star lives a new society. Ruled by a computer system, named Jupiter, men are divided into classes based on their hair color. The Blondies, genetically altered by Jupiter, are the highest class and occupy the capital city of Tanagura. Those with black hair, Mongrels, are forced to live in the slums, Ceres. Iason, the leader of the Blondies, encounters Riki, a mongrel, in the streets of Ceres one night and sets out to own him. 
(Source: June) 
Subtitles for the individual volumes are as follows: 
1: Stranger (&#24112;&#12387;&#12390;&#26469;&#12383;&#30007;) 
2: Destiny (&#21629;&#21205;) 
3: Nightmare (&#21051;&#21360;) 
4: Suggestion (&#26127;&#36855;) 
5: Darkness (&#38263;&#12356;&#22812;) 
6: Metamorphose (&#34909;&#21205;&#12398;&#24341;&#12365;&#37329;)