The "Glass Sakasa Kebari" is a pattern that I spent some time tying & fishing different designs when I first became interested in Tenkara, starting with my first rabbit & muskrat fur patterns posted in 2012. I tied then tried it in a variety of colors, but finally settled on simply Dark & Light versions. Glass beads with Antron dubbing and variegated hen hackle.
The "Glass Jun Pupa" is a traditional soft hackle kebari. It is a good way to utilize the effective, so-called "Wet Fly Swing" due to it's soft hackle and bright glass beads. Like all of the Glass line, it sinks quickly, works great at mid depth in many speeds of water flow.
The "GlassCaddis" is new, and an extension of this idea. The Antron dubbing on these two patterns captures air bubbles in the water, imitating a pupa rising to the surface when hatching. Fish as a swung wet fly, or upstream as a nymph. Sinks faster than most flies, but not unnaturally fast like a tungsten bead head so it is more versatile. Great to fish on bottom in slowing water flows to imitate a free drifting Caddis larvae.
The "Glass Midge" and "Glass Ant" patterns are quite popular and a product of thorough field testing.I believe that they are both essential for your kit.
Midge patterns are very effective all season and a good fallback when other patterns fail to produce. We should all fish them more. The midge with it's up-eye hook is great threaded right on your line above a knot, for "dropper techniques". It's the perfect pattern at the perfect depth for the dropper.
Sunken ants (especially the black, sometimes cinnamon) are very effective in the summer around trees, banks & logs, but really come into their own in the fall. I spent many years in my 20s fishing nothing but a sunken ant pattern. It's a great pattern anf far more versatile than the floating version.