Findings:

• Schrödinger's Catbox
• Tell Me a Story; the Catbox Story Archive
• perSon-a (user)
• Null Persona (user)
• Tenuous Trust Insurance Company - Diversity Program Offers New Personas
• Armour Suit IX: persona
• persona entusiasta (user)
• My childhood imaginary Super-hero persona
• in propria persona
• blanks the catbox (user)
• persona (user)
• persona non grata
• Persona
• Semi-permanent catbox (e2poll)
• E2 Catbox Enhancer
• Catbox - Windows chatter client
• X-Chat #catbox Integrator
• edev: XML, the catbox, and you
• catbox loudspeaker (user)
• Catbox dill
• #catbox
• catbox poetry
• Catbox Console Client in Python
• A bot in the Catbox (e2poll)
• Catbox

If you Log in you could create a "catbox persona" node. If you don't already have an account, you can register here.