What do you think of Mascots for apps?

I made this newsletter app, it's had a few cycles - customers have bought it and helped improve it, and I myself use it too.
But I never really got to push the sales massively cos the editor had some bugs, and I was learning how to build it whilst building it.

Anyway, I got a really stable new version ready now, so I'm nearing a launch. But I wondered about having a mascot, just for fun:

The project use to be called EmailOtter when I started it, but I rebranded to 'Letter'..do you think an otter mascot could still work with the Letter branding?

The Otter could look like the one at the top of this post, but use vectors or change the style. The otter will be called Pongo, I generated it with midjourney.