Home -> Small and cheap apartment. It's messy and filled with plenty of his junk and is practically falling apart, which is the only reason he's able to afford it, so he doesn't complain. He doesn't really need a fridge to store food in to eat after all... but he'd prefer if his ceiling didn't leak so much...
Job -> Marcen struggles holding down a job, so he bounces between different ones and sometimes offers magical assistance to others for cash when between jobs. He prefers not to do this though as getting the word out can be dangerous if those not affiliated with magic catch on.
Childhood -> Nonexistent as he awoke in a fully adult body with a fully developed 'brain'(Though he still had to be taught how to exist by his master as he didn't have any knowledge of the world when first created). Wasn't born but instead crafted by a spell and brought into the world by a powerful magic user to be her servant.
Backstory -> He awoke under the care and command of the woman that created him. His "Master". He only gained a true will of his own when his master died. He was under her command for the first 15 years of his life and has spent the last 5+ trying to figure out how to navigate in a world by himself. While his Master was alive, he was bound to her will and command. He had only a loose will of his own and thought nothing of how things were. Now since his Master has passed and he's been freed, he resents the years he spent in servitude and vehemently hates being forced to listen to someone or anything that takes away his free will; despite this, sometimes he can naturally fall into a state of trying to please and listening to other's directions similar to how a servant would. Despite the connection between Marcen's creator and himself having been broken, it's been rumored that certain magics, artifacts, and/or spells could be used to reinstate a connection to a new master... though there is no way for Marcen to lose the sense of self he's developed thus far...
Skin -> The texture of his skin feels slightly tacky and can be pressed into with the same resistance of slightly dried playdough. Imprints can easily be placed in his skin and will slowly vanish with time as if made in memory foam.
Sexuality -> Pansexual and demisexual. (Has no preference for any sex or gender, but needs a strong emotional connection before he'll have any of those feelings for another person)
Relationships -> He liked his master fine while she was alive but has come to resent her after the fact as he's learned what it's like to have free will and to be treated like a person rather than an accessory. He has one person that he considers to be a friend and even a family member that infrequently checks in on him. She only does so because she was involved in his making and had been good friends with his master. She feels a sort of responsibility towards him, but she isn't close with him and doesn't help out often. She insists against him referring to her with anything that could have an affectionate meaning, such as a 'friend' or 'family member'. She also refuses to call him Marcen.
Miscellaneous -> Has trouble determining how much is too much information to give another person so has a habit of over sharing to the point where it can be dangerous to himself. He is also a bad liar, but he does know how to skirt around the truth and tell half-truths if the need arises.
Another fun fact is that while Marcen is canonically set in a world that contains supernatural monsters (demons, angels, vampires at least) he himself only knows about the different classifications of humans that use magic. He has no ideas these other things exist even when he has a set of demon horns in his apartment from when his 'friend' gave them to him. He just assumes they came from an animal of some kind.