Here's the big one. Osamu Ashikaga is the main character of Death by Ex-Girlfriend. Senkumo War Stories is a separate series, in a sense, but the two are connected. They share worlds and a lot of characters. SWS is really more like a prequel to DbEG. Just in case you're wondering he we can go from nyctophobic phantoms with dead children to this.
Hair: He had long black hair that went pretty far down early on, but his appearance changes in the War Cloud arc. His hair is like a black version of Robert Plant's hair here
Eyes: Brown
Skin: White, in a normal, living human being kind of way lol
Clothes: He has no defined outfit. He changes clothes everyday. He does wear a blue button up, white jeans, and bullet belt in Inari Standoff though. He also typically wears a silver peace sign necklace, or sometimes a Male symbol necklace.
Other physical features: He's pretty average build, but a little muscular too
Personality: Can't stop helping people to save his life. He's a pretty upbeat guy, always smiling and trying to help out however he can. He's a good natured man with a badly wounded heart.
Speaking of Inari Standoff, there's no art of him with Inari! If you want to take a crack at that, here's a pic of Inari for ya. The two had a fateful encounter in an empty airport, where Osamu agreed to help her fight off her hunters. They have a deep bond. Initially distrusting of Osamu, Inari eventually opened up to him. Since the both of them were brokenhearted at the time, the two made a promise. "We either win together, or we die together." They found solace in knowing that they would very likely die together trying to fight off the exorcists.
Inari is eating a heart here because devouring blood and flesh heals her and makes her more powerful. She has fallen very low since her appearance in SWS, where she was a gentle goddess of foxes, beloved by her peers and people. She's now a flesh-eating fox "demon", loved only by Osamu.
It's a very melancholic bond and the story is filled with tears and blood, as you can imagine.