Professor Juniper/Manga/PS/History/BW

Professor Juniper debuted in Fussing and Fighting, where she prepared three starter Pokémon to be given to three new Trainers. While on a call with Fennel, the starters got into a fight into each other. The next day, Juniper had three starters mailed alongside a set of three Pokédexes to the house of, one of the new Trainers. Of the three, Tepig ended up in Black's hands, while and  received  and, respectively. Due to Black's impatient nature, he accidentally dropped Cheren and Bianca's Pokédexes in a puddle of rainwater, damaging and rendering them unusable. While the Pokédexes undergo repairs, Juniper sent Cheren and Bianca off to find Black and inform him to keep his Pokédex safe.

After Cheren and Bianca successfully met up with Black, they gave Professor Juniper his Xtransceiver number so that she may be in contact with him. In At Liberty on Liberty Garden, she contacted Black to have him and travel to Liberty Garden in order to get data on the Mythical Pokémon. After Black succeeded in this mission, Professor Juniper's father, Cedric Juniper, arrived to assist in repairing the Pokédexes.

By A Lost Melody, Professor Juniper and her father successfully repaired the Pokédexes. She had Cedric sent to Castelia City in order to deliver Bianca her fixed Pokédex. To Juniper's shock, Bianca revealed that she decided to become her assistant and instead handed the Pokédex over to White.

In A Wretched Reunion, Juniper traveled to alongside Fennel. There, they witnessed Black, White, and Cedric in battle with, the king of Team Plasma. During the battle, Cedric revealed that a year ago, N barged into his lab and liberated a second set of starter Pokémon meant to be given out to another set of Trainers. N chastised Professor Juniper for her treatment of the starter Pokémon given to Black and his friends and claimed that she only thinks of them as objects meant to be researched. When Black tried to stop N, his Musha chose to run away instead of eating his dreams as usual. The shock of losing one of his most trusted Pokémon caused Black to faint from shock.

In Dream a Little Dream, Professor Juniper, Fennel, Amanita, and White looked after Black at the 🇺🇳 gates while they watch the tournament.