How about a nice pen set or a notebook with a personalized cover? You could also get them a subscription to a comic book magazine or a book on how to write and draw comics. Additionally, you could consider purchasing a comic book illustration course or an online workshop for them to brush up on their skills. If they have a favorite comic book series, you could also consider a nice set of the series in a hardback edition.
Or you can get her/him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.