Open the Person module image settings, go to the Design tab, open the image-related Sizing controls, and set an Aspect Ratio.
For team pages, portrait ratios usually work best. Try 3:4 or 4:5. Both give the face enough room while keeping the cards aligned. If the design needs tighter rows, 4:5 often feels more compact.
A ratio controls the frame. Framing controls how the image behaves inside that frame. If a headshot looks stretched, open Framing and set Object Fit to Cover. Then adjust Object Position to keep the face centered.