Feature request: companion customization / reroll

Feature Request

Would love the ability to customize or reroll the companion character. Options could include:

• Reroll mechanism — let users randomize a new companion (even if it costs something)
• Companion skins/variants — shiny, legendary, robot, etc.
• Companion shop — I'd genuinely pay for a shiny legendary robot companion

The current cat (Hubris) is fine, but variety and personalization would make the experience more fun.

Thanks!