Eikou is a young woman who likes to crack jokes, spew sarcasm, and crack heads. While she is guarded around strangers, those who earn her trust and friendship are met with a caring and fiercely loyal individual. On the other hand, those who earn her ire usually end up with a chancla thrown at their face accompanied by a colorful string of Spanish words. Behind her seemingly confident and tough personality, Eikou suffers from severe depression and PTSD after losing her father and being placed in the foster system, but wears a mask to hide that part of herself as she's afraid of hurting others. She deeply struggles with finding her place in life and ultimately finding a new family.

Upon finding a Digimon in her back alley dumpster, Eikou is suddenly thrust into a large scale conflict within the Digital World. While she is hesitant to get involved at first, she ultimately decides to help the Royal Knights restore balance as it would be something her father would do.

Eikou was raised by single father Edward Ryder, a US Navy SEAL, who named her after a fellow Navy SEAL. Her Latin American mother passed away when Eikou was very young. In fact, Eikou does not remember her and Edward does not talk too much about her. Despite this, Edward is a loving, doting father and the two develop a close father/daughter relationship. Given Edward was active-duty, the two moved around quite often so it was hard for Eikou to make friends at times.

Unfortunately, war broke out overseas the same year and Edward was drafted. In an ambush, Edward was shot and later passed from his wounds. With no relatives, Eikou ends up going into the adoption system. She becomes overwhelmed with grief and anger, and is afraid of getting close to anyone ever again so she pushes others away. As a result she ends up becoming a problematic child and no one wants to adopt her. She ends up joining a group of other problematic kids and causes trouble. It goes too far when she gets into a fight with a younger kid and pushes him down a flight of stairs, which ends with him in the hospital. So the system has her go to a camp that rehabilitates problem children.

At first Eikou is intolerable. She feels remorse over hurting another kid, but was still too upset and angry to listen. At camp she takes up Jujutsu, where a hispanic coach named Wavery begins to teach her and instill discipline. She lectures and counsels Eikou, stating her grief is normal, but taking it out on others will not bring her father back, and she will end up becoming the people who killed her father if she continues down the path she’s on. Eikou finally starts to heal and develops a close bond with Wavery. Even after Eikou leaves camp, feeling more like her old self, she asks to join the Jujutsu team Wavery coaches outside of camp.

Though she feels immensely better, Eikou still deals with anger/depression issues, but wears a mask to hide that side of herself, more or less afraid of hurting anyone else because of those emotions.

Meeting Veevay

Eikou is one day charged with cleaning her room and suddenly hears a crash from outside. Assuming it’s some raccoons, she heads for the dumpster only to find the wounded Veemon inside. Before she can question him, he runs off.

She later runs into him escaping Animal Control and bails him out to learn more about him. He introduces himself as a Royal Knight who lost his armor, and after some confusion about his current form and how to properly address him, Eikou gives him the nickname Veevay. The Airdramon that was initially chasing the Knight shows up and Eikou helps him defeat it. Afterwards Eikou receives a digivice and reluctantly agrees to help Veevay restore balance to the Digital World, as it would be something her father would do.

Meeting Ribbons

Eikou is grounded for "skipping" school the day she becomes Veevay's tamer. A week later, while being confined to her quarters, Veevay senses a digimon fight. Unable to leave him, Eikou follows and the two find a Crusadermon fighting infected digimon, which Veevay recognizes as one of his Royal Knight comrades. After defeating the enemy digimon, Crusadermon catches up with the newly christened Veevay and agrees to join forces with him and his new Tamer Eikou since their goals align for now. Crusadermon obtains the nickname “Ribbons” after complaining that his comrade got a nickname but he didn’t. Unfortunately, that was the best Eikou could come up with on the spot, much to Crusadermon's dismay at the lack of creativity.