In React JS, you can define the bot persona by passing the `personaOptions` prop to the `AiChat` component.
The `personaOptions` prop is an object with two properties: `bot` and `user`. The `bot` property is what you use to
define the bot persona, as shown in the example below.

```jsx
<AiChat
    adapter={adapter}
    personaOptions={{
        bot: {
            name: 'HarryBotter',
            picture: 'https://nlux.ai/images/demos/persona-harry-botter.jpg',
            tagline: 'Mischievously Making Magic With Mirthful AI!',
        },
    }}
/>
```

The object passed to the `bot` property should match the following interface:

```typescript
interface BotPersona {
    name: string;
    picture: string | JSX.Element;
    tagline?: string;
}
```