Dignity, with a bit of flash. My son's sai case was both easier and harder to do than my daughter's. There was a learning curve with hers, definitely, but there were a few challenges unique to this case with this design.
Let's start with the Sulky Holoshimmer metallic thread for the dragon design (Embroidery Library). I needed only three different colours, but the metallic thread didn't want to unspool evenly, so I had to slow the big machine down to half her speed and stand there with the spool in my hand, gently unwinding the thread bit by bit.
The runes are Elder Futhark (Urban Threads), with the phonetic values that best spell "DRAGON".
My son picked a gorgeous mottled silver on black fabric for the lining of his case. That it was also a stretch knit was immaterial to him. Kobudo Mom makes these things work. Free-motion quilting a stretchy lining meant stabilizing, so I laid it on top of a piece of tear-away stabilizer I use for embroidery. It puckered, here and there, but I'm not showing you where.