Despite her physically frail appearance in the early series, she is described as being "strong to the core". A Journey Through the Eras
From a young age, Hikari has shown a deep-seated desire to avoid being a burden to others, often hiding her own illnesses or struggles so her brother wouldn't worry. Yagami Hikari
As the Digimon franchise grew, so did Hikari. We’ve seen her evolve from a quiet toddler to a capable young adult across various series: The paradox of the relationship between Takeru and Hikari Despite her physically frail appearance in the early