A person who doesn't change with time could be described in different ways depending on the context and perspective. Here are a few terms that might apply:
Stagnant: This term suggests that the person remains unchanged or makes little or no progress or development over time.
Immutable: This word implies that the person's characteristics or personality are unchanging and resistant to modification.
Consistent: While consistency can be seen as a positive trait in some contexts, it could also indicate a lack of change or adaptability.
Unchanging: This term simply states that the person remains the same over time without significant alterations.
Static: Similar to stagnant, this term indicates a lack of movement or development in the person's life or personality.
Fixed: This word suggests that the person's attributes or mindset are firmly established and don't undergo significant changes.
Constant: While constancy can be seen as a positive attribute, it might also indicate a lack of change or growth in certain situations.
It's important to note that humans are dynamic beings, and change is a natural part of life. So, a person who doesn't change at all with time might be a rare case, and the terms mentioned above are not necessarily indicative of positive or negative qualities. The perception of whether this is good or bad would depend on the context and individual viewpoints.