Its a flavorful touch that fits the characters skittish personality while it also makes gameplay more fun and thematic
How Rare Is Each Card In Disney Lorcana
Security is equally vital
Palette Swap: The numerous examples of Color-Coded Armies throughout the game where human units share general jobs with one another, but their on-field sprites have different color palettes to showcase their affiliations
You need to spend so many resources making the Equipment theme work that it can sometimes become difficult to gain card advantage after a board wipe
Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)