Chronos, is a Heavenly one and the first to sacrifice his organic body for a mechanical one so as to be able to better fulfill his task of keeping track of life and death.
Chronos is the record keeper of time and as such he is very thorough and has rarely had any mistakes. The Leviathan grants life to the creatures of the world, and transmits the information to Chronos, whom then crafts a new hour glass and takes some of the soul of the creature to create it. If a creature dies, Behemoth informs Chronos whom discards the hourglass and sends the information on to Death, a Shinigami, or otherwise, to carry out the mission.
Chronos is very busy as he has to keep track of everyone born and everyone whom dies in history Via the hour glasses that contain sand created from bits of their souls. Together with Urth and the Earth alone (Not even counting the alternate dimensions and other creatures he keeps track of) there are 534 humans born every minute, and 216 humans die every minute. This means he needs to create and infuse 534 hourglasses with energy every minute as well as turn over 216 of them and destroy the hourglasses to be recycled as new pieces. Creatures with short lifespans such as insects use one hour glass per type of insect with each grain of sand representing 1,000 of their type (Which explains those insects that sometimes just don't die when you smash them). If something happens and there are a sudden influx of deaths or births then Chronos constructs himself new arms amidst his working. It is said that there was once a cataclysm that required him to have 2,000 arms for 10 minutes.
Chronos resides in the tower of Aeons in the center of Mechanus, which is a facility in Celestia that creates angels and parts for the Heavenly ones. Chronos has been in the tower for millions of years and is rather bitter and mean towards people. Chronos has many sensors within his head that can relay messages to Death, The Behemoth, and the Leviathan as well as Apocalypse so he can keep track of who is to be born and who is to die next. It is not unlikely that if Chronos dislikes you, for him to end your life by faking that your hour glass has run out. However he will NEVER extend your life for any reason, even if it is a mistake he made.
Chronos controls the Aeons and the Inevitables in Heaven. Whom track down those whom try to defy death so they can be granted judgement. He controls the Inevitables like they were white blood cells and he was the body, or similar to a Queen Bee commanding her young. It is also said that due to the nature of it's construction, Chronos is always connected to Mechanus and can use any part of the realm as if it were his own body. Because of this insane power to become a plane of existence much like an Elder god can, Ra fears the power and has forbade him from using it to it's full extent, unless he commands it.
Chronos holds a staff that allows him to create Radial Time Dilations which are small bubbles of existence that alter time and space to either slow or speed up time within it. However it was stolen from him by the robot "Bomb BRDLI"
When it comes to personality, Chronos is very insulting and not very kind at all, but then again he has been doing his job nonstop for millions of years.
Chronos is was fun to design and he's had the same design ever since I thought him up (But never illustrated it) years ago. He was also the most difficult to ink as he has so many straight lines, lol.