Sakura Igarashi

Like her two brothers, Sakura greatly cares for her family and reciprocates the love that they have given her through treating Ikki's injuries from fighting the Deadmans. She will not forgive those who hurt her her family, and was visibly heartbroken at the thought of her family being torn apart after Kagero revealed himself to the family. She lambasted Fenix for dragging her family into this mess, and questions the need for Kamen Riders to protect the world if it comes at the cost of tearing her family apart.

Being trained in karate, Sakura is also strong and self-reliant as she can defend herself from the Deadmans and even managed to escape a hostage situation unharmed without the help of her brothers. However seeing that both Ikki and Daiji have gained the means to protect their family from non-conventional threats, Sakura began to wonder about the meaning of true justice and whether or not achieving it would also mean happiness. However, her experiences have only left her with more questions than answers.

Despite Sakura's strength, Vice had sensed the inner demon lurking within her that represents her feelings of helplessness and self-doubt, which Aguilera had planned to exploit for her own purposes. This culminates into Sakura receiving the Libera Driver from Weekend and recklessly transforming despite her inability to do so, which results in Ikki getting injured when protecting her. Ultimately, Sakura recognizes her weakness, and transforms successfully with a newfound resolve to become stronger. After becoming Jeanne, Sakura has become extremely prideful and does not take for granted in her role as a Kamen Rider, often resorting to fight head-on.

During Weekend's attempts to recruit her, Sakura became determined to help Julio and eventually Aguilera settle into a civilian lifestyle after their defection from the Deadmans group, having far more luck with the former than the latter. Doing so, she became very empathetic and headstrong

Humorously, Sakura is shown to be a big eater, eating a large Onigiri in ten minutes whilst entering the bathhouse, even eating stockpiles of them in Ikki's subconscious. Additionally, Sakura tends to use the honorific Chan (ちゃん) for some people, notable examples being her older brother Dai-chan (大ちゃん), her inner demon Love-chan (ラブちゃん, Rabuchan), and Kage-chan (カゲちゃん).

Sakura Igarashi is the third born child and only daughter of Genta and Yukimi Igarashi, and also the younger sister of Ikki and Daiji. Before she was born, Yukimi was pregnant with Sakura at the time when Happy Spa was originally burned down by Vail. The bathhouse would be rebuilt then, and Yukimi gave birth to Sakura without complications.

At one point during her childhood, Sakura wanted to be "invincible" when she grew up and began to learn karate in her adolescent years. By the time she began high school, she had earned a black-belt.

Ikki/Kamen Rider Revi: Ikki is Sakura's oldest brother, and like Daiji, Sakura looks up to him greatly. When it came to Aguilera, she asks Ikki to save her and be freed of her demon. However, she later changes her mind, freeing Aguilera herself.
Daiji/Kamen Rider Live: Daiji is Sakura's other brother who was against her fighting the Deadmans. When Sakura became a Kamen Rider, he changed his opinion of her as they fight together.
Yukimi: Sakura's mother who objects her fighting the Deadmans as herself and a Kamen Rider. After facing the Chameleon Deadman, Yukimi changed her opinion and supported her.
Genta/Kamen Rider Vail/Kamen Rider Destream: Sakura's father who loves his family very much. His past proved shocking when he appears before her and her brothers as a Kamen Rider when Vail possesses him again. Eventually, he returns, reuniting with her dad as he's under Weekend's protection from his former inner demon.

Lovekov (ラブコフ, Rabukofu) is Sakura Igarashi's inner demon. She is the manifestation of Sakura's weaknesses and childhood past-self. Despite lacking her partner's combat capabilities, she can transform into weapons for Sakura to use. Later on, she and her host would be able to fuse into Kamen Rider Invincible Jeanne (仮面ライダーインビンシブルジャンヌ, Kamen Raidā Inbinshiburu Jannu).