Ryoma Akagi

Towa Akagi was Twilight, Power Rider Nightfall and Power Rider Eclipse.

Becoming Twilight
As a child she was known as Princess Towa. She dreamed of being a Grand Princess. Though her brother Prince Kanata told her how only the Regal Riders could become Grand Princes/Princesses, that did not stop her from trying. As a child, she would play the violin with her brother. One day, sensing her desire to become the queen, Dyspear appeared and told her that she could help her become one. Towa accepts her offer, not knowing that she was going to become a pawn in Dyspear's plan to conquer Hope Kingdom. Dyspear actually trapped her inside the Forest of Despair as part of that plan. Soon after, the citizens of Hope Kingdom fell into despair because of Towa going missing, making it easier to Dyspear to take over as she fed on that despair. Dyspear then decided to brainwash Towa and let her assume the name Twilight.

Her Last Battle Against the Riders and Her Purification
When the Riders, along with Kanata, arrived at Hope Kingdom, Twilight greeted them. Kanata recognized her as Towa and tried to talk to her, but she does not remember him and wants to destroy them. Using a Dark Princess Perfume, she becomes Power Rider Nightfall. She nearly defeats the Riders and Kanata, but Rey continued to fight back, still believing that the real her was deep inside. The Riders join their finisher an attempt to purify her, and with the help of Kanata's violin playing reawakening her memories, Towa was freed from Dyspear's control. The Riders, along with a weakened Towa, then escaped Hope Kingdom, with Kanata staying behind to fend off an enraged Dyspear.

Making Amends and Becoming Power Rider Eclipse
The girls brought Towa to Noble Academy and she stayed in Sierra's dorm room. While sleeping, she had a nightmare of Twilight, and she woke up scared. Taking her black keys, she went for a walk in the campus. Then she saw Haruka playing the violin and remembered her memories with Kanata. Haruka wanted to give Kanata's violin to her, but she felt unworthy because of her actions in the past. As they conversed, Dyspear suddenly appeared and made Towa fall deeper into despair and trapped her and Kanata's violin in a cage of thorns, feeding on that despair. As Keanu and Sierra arrived, the three of them, along with Jamie, transformed and fought against Dyspear in order to rescue Towa. Rey was able to enter the cage thanks to the help of his friends and saw the violin as well as a hopeless Towa. She spoke to Towa and she was moved by Rey's words. Rey decided to play his flute sword to deliver his feelings to Towa, just like how Kanata did in the last battle and Towa was moved by his words and she took back Kanata's violin. The two of them played and their melodies combined into one, causing them to break free from the cage. Towa announced she was not going to despair anymore, but Dyspear knocked her back with thorns. As she was falling, she looked back at what she had done as Twilight and decided to carry the weight of her sins and resume her dream of becoming a Grand Princess as the indigo fire that came to her aid turned crimson, purifying her Royal Driver (turning it into the Eclipse Driver) and her Royal Keys. With one of those keys, she transformed into Rider Eclipse and easily defeats the clones and using the Eclipse Breaker, she uses Phoenix Blaze to attack Dyspear and force her to retreat. After the battle ended, she says that she knows Kanata is still alive because she felt it through her sword.

Life at Noble Academy
After her first battle as Eclipse, Towa tries to get used to life on Earth. The Riders took her on a tour of the cty to help her do so. After buying a new outfit, checking out art galleries and taking pictures with the others, she sat down to enjoy a donut, but she reveals that she couldn't enjoy herself with Hope Kingdom still being under Dys Dark's rule. She leaves and begins going around town herself, still unsure of the customs of her new home. She stops traffic, tries to purchase a castle and even tries to look for a job. In the end, she seemed to have given up when the headmistress spots her sitting on a bench in the park and the two go to a cafe to eat and talk things over. the headmistress tells her to surround herself with warm feelings and to stay positive. Just then, the headmistress was targeted by Lock and he uses her despair to summon a Zetsuborg. Towa transforms into Power Rider Eclipse to try to save her. Throughout the battle, Lock still refers to Eclipse as Twilight, or the Princess of Despair, and taunts her. Eclipse couldn't defeat the Zetsuborg on her own, and to make matters worse, Lock powers it up and feeds on even more of the headmistress's despair. Just as Eclipse was about to be defeated, the other Riders show up. Eclipse was still discouraged, believing that all she does is make everyone despair no matter whose side she was on, but Rey tells her that good and bad experiences can be shared with everyone and hugs her. Eclipse also embraces Rey and decides to officially join the team before defeating the Zetsuborg and freeing the headmistress. After the battle, they all returned to Noble Academy to speak to the headmistress. She then enrolls Towa as a student.

Reuniting with Kanata and the Promise to Restore Hope Kingdom
In episode 40, Towa is happy that her brother, Kanata, regained his memories as a prince and they start reacquainting. She shows Kanata everything she has learned in Earth at Noble Academy and also shows him the Eclipse Breaker. As they continue, the Royal Key reacts and inserts itself into Towa's Eclipse Driver and seconds later, the entire group found themselves in Hope Kingdom. Because of Dys Dark's further influence over it, the once flourishing kingdom was now completely covered in vines, which scared Kuroro and causes him to run away. Towa starts to have flashbacks about her mother and father as well as what had happened to the kingdom after Dyspear lured her away. She becomes vengeful and vows to destroy Dyspear for what she had done. Dyspear sends a Zetsuborg clone of herself to attack the Riders and Eclipse charges at it recklessly. She gets beaten very badly because of this, but when she sees a tearful Kuroro returning, she remembers her parents telling her that the kingdom's citizens' emotions always reflected hers, and tells Kuroro to cheer up. With her strength and will renewed, she vows to save the kingdom and her parents before using Eclipse Strash to weaken the Zetsuborg, with her and the rest of the Riders purifying it. After their victory, the vines on the Solar Temple started to retract, and Eclipse uses her Regal Keys and the Music Princess Palace to restore it and cause the red arch of the rainbow to return.

Power Rider Nightfall

 * Eclipse Driver - transformation device
 * Nightfall Breaker - personal weapon
 * Royal Keys - transformation trinkets

Power Rider Eclipse

 * Eclipse Driver - transformation device
 * Eclipse Breaker - personal weapon
 * Royal Keys - transformation trinkets