Bot Persona tab in the UltimateGPT settings page allows you to define an identity and tone of voice for your bot.
The first section controls the identity of your bot. The settings you can change here are the name of the bot and name and a description for you your company. This way the bot knows who it is and where it's working in. Keep in mind that to avoid confusing the users, the bot's name should be the same as what's configured for the chat widget.
Tone of Voice
Tone of voice settings control what type of language the bot uses when responding to the users. You can control tone and length of the responses separately. The preview in the right hand side will give you an idea of how these options affect the responses.
Additionally you can allow the bot to answer with knowledge that doesn't exist in the knowledge base. By default this is disabled but if you have some less serious use-case for your bot then you might want to consider allowing this to make the bot more fun.