Nozomi Yumehara is a civilian and magical girl known as Cure Dream, the Pretty Cure of Hope, whose catchphrase is "It's decided!" She begins as a second-year student at L'École des Cinq Lumières Institute, with round dark mauve eyes and straight dark magenta shoulder-length hair styled in pigtails secured by yellow bobbles. Her casual attire includes a pink long-sleeved blouse with dark mauve trimming and dark indigo knee-length pants; her summer outfit features a pink scalloped top and blue frilly skirt. Movie appearances show variations like a checkered jacket in the Yes! Pretty Cure 5 movie and a frilly pale yellow top in the GoGo! film. As an adult, her hair is longer and tied in braids, worn with professional attire like a light violet dress shirt and peach pink coat.

Her personality blends optimism with impulsiveness. She exhibits a caring nature and strong belief in helping others, though she is easily distracted, particularly by food, and struggles academically. Despite lacking notable talents initially, she compensates with unwavering kindness, even toward adversaries. As Cure Dream, she becomes more focused and determined in battle.

Her journey starts upon discovering the magical Dream Collet book in her school library. Meeting the fairy Coco from the destroyed Palmier Kingdom, she agrees to restore it by collecting 55 Pinkies and becomes Cure Dream. She later recruits four classmates to form the Pretty Cure 5 team, an experience that helps her discover her dream of becoming a teacher.

Transforming into Cure Dream significantly alters her appearance: her hair brightens to pink, grows longer, and forms ring-shaped pigtails secured by yellow butterfly clips. Her outfit includes a pink-and-cream crop top and skirt with butterfly motifs, fingerless gloves, and magenta boots. Power-ups introduce evolved forms: Super Cure Dream adds wings and sharper accessories; Shining Dream (Yes! Pretty Cure 5 GoGo! movie) features feather-like designs and angelic wings; Rainbow Cure Dream retains Shining Dream’s appearance with smaller gold wings; Dream Cure Grace (adult form) incorporates butterfly-winged skirts and layered hair.

Her combat abilities center on crystal and earth elements. Initial attacks include Crystal Shoot, firing magical pink crystals. Later techniques like Shooting Star and fusion attacks (e.g., Ten Power Attack with other Cures) demonstrate expanded capabilities.

Key relationships define her story. Childhood best friend Natsuki Rin remains a steadfast ally. She befriends the similarly energetic Urara Kasugano. With Coco, she develops a mutual romantic connection: they share an almost-kiss in GoGo!, exchange letters as adults, and eventually marry after his proposal during her recovery from a battle-induced coma. Rivalry with the fairy Milk over Coco’s attention evolves into friendship. As an adult teacher, she mentors student Rumi Katagiri, striving to protect her dance aspirations.

A later storyline reveals a twin sister, Yumehara Kibo, linked through dreams. Nozomi hid from the antagonist Shadow due to her power’s world-influencing potential. She guides Kibo via dream encounters, providing a silver coin symbolizing perseverance. Their reunion under a ferris wheel leads to joint battles against Shadow’s forces, combining their powers as Cures.

Her adult life fulfills her teaching dream at Plaisir Academy. When Shadows threaten reality, she temporarily reverts to Cure Dream despite physical strain, culminating in exhaustion and hospitalization. Post-recovery, she balances teaching with married life in Palmier Kingdom.

The All Stars GoGo Dream Live! special features her alongside other Pretty Cure teams combating a dark giant to protect a live performance.