I like those sets of designs for the arm, knee, and foot bracers. The thematic style is pretty consistent and the detail into each piece looks great!

A very nice and thorough exploration of the possibility space for each thematic needed for the finished drawing. Concerning transforming swords, you might be interested by Skallagrim's video about a realistic take on the Monster Hunter sword-axe convertible weapon :
https://www.youtube.com/watch?v=LDupX99T-GU

Oooh, very cool!

It shows how much effort you put into both setting and keeping to a theme through the entirely of a character design process, while offering subtle variations.
Also, it shows some inventive "near-realistic tech" you design in order to let things like the sword come off as fantasy, but believable; the ratcheting pull-ring is a great example of this.
Very enlightening, Loup. Nicely done.

❤️

Amazing

I wonder if you do it every single time, for every art piece, no matter how insignificant it might be

For development commissions, this is par for the course. It's a pick-and-mix and my job is to offer options

Oh I get it. It looks like in art community generaly frown upon those people who doesn't do like 50 initial sketches for one draving, also I think I should try something like this once.