Grandma Paguro is a loving and understanding sea monster who plays a role in the life of her granddaughter, Luca. She is portrayed as a wise and compassionate figure who recognizes the importance of growth and the natural curiosity of youth. Despite her maternal instincts, Grandma Paguro has a more relaxed attitude towards rule-breaking, understanding that it is a part of the process of maturing.
Her willingness to "look the other way" suggests that she values the experiences and lessons that come from making mistakes and testing boundaries. This perspective contributes to the development of the characters and themes within "Luca."

Grandma Paguro's character adds depth to the film by providing guidance and support to Luca and Daniela as they navigate their own paths of self-discovery and friendship.