I didn’t read the phrase mini-portfolio initially which slightly changes my thoughts:
-If this is on your website, go for it - tabs are free and I don’t have to click your “other/photography/whatever” link if I don’t want to.
-If this is for a teaser portfolio you’re attaching to a job application, leave it out. I review a lot of portfolios via my phone and bloating your PDF with extras seems unnecessary.
-If it’s a full portfolio you’d be presenting in person, you can bundle a few shots towards the end of the portfolio. Most portfolios I like to see a brief “about” page on the candidate while they give their background. Again - keep it oriented towards the job. If you are a cosplay fanatic and it’s a demonstration of your hand prototyping skills - thats awesome. If you like dressing up as a furry for weird reasons - leave it out.