Here are some headcannons about Reiko:
He may not like Earthrelmers (well, not til she literally popped in his life), but he LOVES animals from Earthrelm.
He has a pet American possum named Vict Solud ( hc Outworld words), meaning little soldier after finding him clinging to life after his mother was killed. Shout out to @boomclowntown who drew me Reiko and his "son" almost a year back.
Is a sucker for true crime. He also loves the murder mystery games like Hunt a Killer or Cold Case. Alot like the main character in high potential, he can't relax until he figures something out.
Horror movies he is a bit picky when Johnny dared him to sit through a bunch of "disturbing" horror movies. Oddly, he's not a fan of movies that are gorey for the sake of being gorey like terrorfier.
His favorite Disney film is hands down Lilo and Stitch.
When he isn't at war or training, he helps out the wounded soldiers he brought back home, or will do random volunteer work for whomever needs a pair of strong hands.
He firmly believes that soldiers have to commit acts of service to the people when they are not actively at war. He helps the fishermen with their nets, repair homes of the elders in the cities, give comfort to widows, and orphaned children of fallen soldiers. He has been found silently crying when he has to go to the families of his men and tell them they will not be returning home or will be returning wounded.
At that point in Earthrelm, he converts some spare gold to the local currency and gives it to the local homeless veterans to find a home or their next meal.
Once returning from Earthrelm, a potbelly pig was found following him through the portal, and Reiko just took him under his wing, now another "child" to him.