This is often considered the most powerful tool for RMXP. Users on the RPG Maker Forums recommend it because it allows you to layer hair, clothes, and accessories onto a base template specifically for XP's taller sprite style.
To maintain visual cohesion, the tool should: rpg maker xp character creator
The creator would function as a layered compositor, similar to paper-doll systems in modern RPGs. This is often considered the most powerful tool for RMXP