During their travels, Yomie recorded information about Haplif and his people in her cloud diary. Yomie eventually deduced that the Agbui were manipulating them and that they were telepathic, forcing Haplif to kill her. Haplif claimed that Yomie wished to remain behind on Shihon for several weeks to watch birds, allowing Yoponek and the Agbui to move on to the planet Celwis, where Haplif intended to further his plans.
Between their primary and final education, Yomie and her betrothed, Coduyo'po'nekri (Yoponek) agreed on spending the traditional wandering year traveling the Chiss Ascendancy. They had five months to go, when Haplif of the Agbui overheard them discussing finances and their next destination within the Ascendancy. Haplif, eager to gather more information about the Chiss to sow the seeds of civil war on behalf of the Grysk "Jixtus," quickly offered the couple passage aboard his starship. He assured it would save the two Chiss funds and provide guidance for the Agbui, claiming they were cultural nomads. Yoponek was immediately convinced, while Yomie hesitated. She was intrigued by the offer when it came to their finances, but wasn't particularly happy traveling with strangers. In the end, she was convinced by Haplif giving her a beautiful nyix brooch.
For the first five weeks, everything worked out fine for the young Chiss. Over the course of their time together, the Agbui would attempt to touch Yomie's temples, claiming to be doing so as a sign of Agbui friendship. Shimkif, another Agbui aboard the ship, was able to touch Yomie's temples a couple of times, but the young Chiss was starting to learn how to dodge the attempts. However, these touches secretly allowed the Agbui to establish a telepathic connection with whoever they were touching. Trouble began when Haplif learned from Yoponek about Councilor Xodlak'uvi'vil (Lakuviv) on Celwis, who the Agbui deemed as the perfect handle for his plans. He tried to convince Yoponek that meeting with Lakuviv would help the young Coduyo to make a name for himself in the Ascendancy. Haplif, eager to meet Jixtus's deadlines, secretly wanted to travel to Celwis immediately. Unfortunately, Haplif had promised Yomie that the Agbui would take her to visit the Grand Migration of birds on the planet Shihon, which would last a full month, and Yomie was determined not to miss a single day. Her dislike for the Agbui and their recurring tries to touch her temples made sure that Haplif had no chance of convincing her otherwise. Haplif and Shimkif both agreed that they had to do something about Yomie. They first tried it the friendly way, even conducting a fake wedding ceremony between them to soften Yomie's heart. However, the young Chiss would not budge, especially not after the hyperdrive failed on their way to Shihon, which she believed was just another attempt to disrupt her plans for the Grand Migration. Haplif came to Yomie's room to apologize for the delay, stating that, at worst, she would only be a day late to the Migration. He discovered her cloud diaries, in which she had recorded information about the Agbui. Yomie prevented him from reading anything in there though.
Even though they were late for the Grand Migration on Shihon, Yomie and Yoponek would enjoy the first three days of bird watching. However, because Shimkif poisoned some of the migration landing fields, the birds changed course and the Grand Migration ended prematurely. Furious, Yomie would return to the Agbui ship, where she would discover two more bird migrations happening on Shihon, specifically one in the Panopyl Mountains. Yoponek was now even more partial to the idea of going to Celwis, but she was able to convince him and Haplif to stay on Shihon for at least a couple more days.
This time, unable to disrupt the migration again, Shimkif succeeded in poisoning Yomie with the help of the venomous greenstripe, incapacitating the young Chiss. Still not ready to give up, Yomie sent Yoponek to watch the birds on the next day on his own, while she remained in her room aboard the Agbui ship. As Haplif tried to convince her that it was finally time to go to Celwis, Yomie tricked him to touch her head while she appeared to be weak. Haplif, not expecting to read any violent emotion by using his telepathy ability, was shocked when he felt her hatred. Yomie, who had already suspected the touches to her and Yoponek's head to be more than just a sign of friendship, realized that the Agbui were telepathic. She then accused Haplif of being responsible for the cancellation of the Grand Migration, and when she threatened him to tell Yoponek that the Agbui had been manipulating him, Haplif had no chance but to kill her. Still needing to use Yoponek as his guide, Haplif claimed that Yomie wished to remain behind on Shihon alone while the Agbui and Yoponek went to Celwis to speak to Councilor Lakuviv. Yoponek was first surprised that his betrothed would go watching birds alone without telling him herself but was also eager to go to Celwis. Haplif was able to convince him of this lie and further cemented his resolve by giving him Yomie's brooch, stating that it was Yomie's promise they would be reunited again. On the way to Celwis, when Yoponek was fast asleep, the ship quickly dropped out of hyperspace to shove Yomie's body out the airlock into the vacuum of space, accompanied by her cloud diaries and any information she had gathered about the Agbui.
Yomie was hesitant to spend time with non-Chiss like the Agbui or, worse, to be in debt to them. In her relationship with Yoponek, she was the more practical and the decision maker of the two. She also appreciated fine jewelry and showed a great interest in wild birds. According to Shimkif, she longed for wide-ranging travel and a balanced family.