Start with the cat's place
Many cat memories are tied to a window, a chair, a keyboard, or the foot of the bed. A good gift can belong near that place.
Small details matter
Whisker shape, coat color, a white paw, or a crooked ear can matter more than a formal portrait. Ask for the photo the person keeps opening on their phone.
When a display piece works
A crystal block, shadow box, or keepsake box often fits cat memorials because it gives small objects a permanent place.