A depiction of Touhou 15.5 this time. It's a fighting game.
STORY: One quiet day in Gensokyo, too much spiritual power was being taken away, and even physical power. Anything electrical wouldn't work, in fact, people fainted very easily. If this continued any more, everyone in Gensokyo would die. People in Gensokyo notice a strange power coming from the east, and decided to head there and investigate.
Species: Youkai
Abilities: To know exactly where she is
Age: At least 7,000 years old
Occupation: Unknown
Location: Sealed Chamber of Doom
Machiyama were a group of youkai, but deadly, dangerous and magical youkai. Enza was their eldest daughter. Enza's younger sister was weak and hopeless, so they protected her a lot. However, Machiyama's were not enough and were outnumbered. Their younger sister was put away into a chamber and lived there for several years.
One day, Enza was going lala when she suddenly encountered her sister. Before she knew it, Enza lost her legs and sight. She now has a pet frog to guide her ways.
Now she hates her sister horribly. Being blind is not fun.
During Touhou 15.5, Enza comes up with a plan to find her sight again and hopes to wake up with new legs.
Original Text
No Japanese translation.
Yet.
Tomisha no Toyoka
Translated
~Scientist Who Holds Buckets of Water
富紗 豊香
Tomisha no Toyoka
Species: Human
Abilities: Unknown; but extremely scientific
Age: 15-20
Occupation: Scientist, Servant of the Machiyama
Location: Sealed Chamber of Doom
A rather strange person, it is debatable whether Toyoka is a girl or a boy. Her personality and her appearance makes everything so confusing. For explanation sakes, let's just say she's a girl.
Toyoka had so much interest in science, a little too much, Toyoka moved to Gensokyo, hoping someone would actually care about what she does. She assisted the Machiyama family with lots of technical work and she was treated nicely.
According to ChocolateLily, buckets of water represent youkai virtue and fortune. With the buckets of water Toyoka creates, she wishes the Machiyama fortune.
She is Enza's friend and ally and will help her with anything, since frogs aren't perfect.
During Touhou 15.5, Toyoka uses her science to try something new.
It's still unknown whether she really is a boy or a girl.
Original Text
No Japanese translation.
Yet.
Eiron "Mikorin" Mimisatotoyo
Translated
~Child of Purple Faith
永論 "神子燐" 耳聡豊
Eiron "Mikorin" Mimisatotoyo
Species: Half Human Half Youkai
Abilities: Manipulation of Spirituality
Age: Relatively young
Occupation: Captain of the Oraple
Location: Oraple
Eiron was a young child from a properous family. She was relatively faithful and worked as the priestess of a temple, the Kanmeiji. However, soon, her parents abandoned her for some unknown reason, causing her to emotionally lose control. She traveled along deserted roads until suddenly, someone welcomed her into a border, which lead her to Gensokyo. There she would make new friends.
Due to her new immense power, to manipulate spirituality, her human body could not handle it and she became a half youkai. Eiron didn't mind; it would come in useful.
Used to being in a high position, she opened up her own kingdom, desipte how young she was. She called Oraple, a mix of 'Purple and Orange', her favourite colours. Many people were quick to join and Oraple was successful. She became respected for giving everyone a new home, she was named 'Mikorin' (lit. Child of God's Phosphorus).
During Touhou 15.5, her temple was literally 'shut down' for no reason, forcing Eiron to head out and save her kingdom.