Jade was just introduced in season 2 of Stargirl, and it revived my interest in the character and her brother. It also gave me some ideas for a redesign of both.

For Jade, I stayed pretty close to her original and classic designs, but used the likeness of Ysa Penarejo, who plays her in Stargirl.

For Obsidian, I went a bit of a different route. The look I gave him was more inspired by his New 52-Earth 2 design (I actually learned after the fact that it wasn't first iteration to wear a long coat, as Alex Ross gave him one in Kingdom Come, in an homage to The Shadow).
I also chose to give him the color scheme of his namesake, the obsidian stone, instead of his classic blue.