Alrighty then KR fandom strap yourselves in for one hell of a ride. Because I am coming at ya with my Rider headcanons. Before I start I would like to mention that some of these headcanons are dark and gruesome and might trigger an unwanted reaction in you. So proceed with caution.

Alright

Let’s go

Trigger warnings:

Abuse (All kinds of abuse mentioned here) 

Alcohol and drug abuse

Suicide attempt

Kamen Rider Fourze: Gentaro’s Dog Tags

Those dog tags Gentaro wears around his neck all the time used to belong to his deceased father. His father was stationed overseas. He used to call Gentaro up whenever he could to check up on him and his mother. He would even send Gentaro a small gift. It was small and meaningless but to Gentaro it meant the world. But when Gentaro got the news that his parents had passed away he took his fathers dogtags and wore them himself. it was his way of having a piece of his dad wherever he  went. Even the rest of the KRC questioned him about them in which he simply replied “Oh these.,..this is a part of my dad that I always carry with me..it makes me feel like they are always with me somehow″ 

Kamen Rider Wizard: Haruto’s Horrid Past before the Sabbat

We don’t know Haruto’s life before the Sabbat and before he became Wizard. But Haruto’s past before the Sabbat was pretty gruesome and dark. Since he had no parents to guide him he hung with the wrong crowd and lived with the wrong person . A middle aged man by the name of  Yoshi took him in. He seemed nice at first he got well fed, he got new clothes but soon Haruto’s life took a turn for the worst. Yoshi turned to drugs and alcohol. He even started started to invite men twice Haruto’s age to let them do all sort of illicit things to Haruto so he could get money for his drugs and alcohol. He also abused Haruto severly both physically and mentally. Haruto’s psyche became so damaged that he  had attempted to end his own life twice. First by hanging and the second by mixing pills and alcohol. Then Haruto himself started with drugs and alcohol.He hung with the wrong crowd he got in all sorts of trouble with the law. His life went down hill until he met a guy named Yaku. Yaku was a nice guy who was brought up by a nice family. he and his family took in Harutto in as their own. Yaku helped Haruto back on his feet and became his greatest friend. Then one day Yaku passed away due to a terminal illness.  Which left Haruto devastated and thus he attempted sucide once more by standing on the train tracks and waited for an oncoming train  (Someone had been courageous enough to pull him away from there). Then came the day Haruto got kidnapped  and used in the Sabbat. Since then he has no memories of Yoshi,,Yaku or his horrid past and that is probably for the better.

Kamen Rider  W: Shotaro was a victim of child abuse

Shotaro didn’t have the easiest time growing up. His father was a abusive man. His mother had left him and Shotaro when he was just a little baby. So his father blamed Shotaro for his mother leaving. It started off with verbal abuse such as calling Shotaro a faggot , wothless every horrid name under the sun. Then it escalated into physical abuse. he would often assault Shotaro  with a metal pipe and sometimes it would be a whip with his belt. One day Shotaro decided he had enough and ran away from home. He traveled to the city of Fuuto where a elderly couple took him in and raised him.

Kamen Rider Den-O: Ryutaro is  actually a schizophrenic hallucination caused by her sisters 

schizophrenia

Airi never had a little brother named Ryutaro. She was a 

schizophrenic  girl and Ryutaro was just one of her hallucinations.  She always wanted a little brothr so she was happy that one had appeared. Ryutaro’s bad luck was her own insecurites and hardships with her 

schizophrenia. She refsued to take ehr madications because she didn’t want Ryutaro to go away. But one day she had to come to terms wit her illness and this took her medecine.