22 years ago - Ryand'r is born on Tamaran.
12 years ago - 10-year-old Ryand'r is sent to train with the Warlords of Okaara.
10 years ago - 12-year-old Ryand'r is taken as a slave when the Citadel invades Tamaran, despite their agreement with the Tamaranian royal family.
7 years ago - 15-year-old Ryand'r escapes Citadel enslavement & joins the fight to free Tamaran, becoming a guerrilla fighter against the Citadel, fighting alongside Starfire & Nightwing. With Tamaran safe, he continues to look for ways to fight the Citadel.
6 years ago - 16-year-old Ryand'r rescues Elu from imprisonment.
4 years ago - 18-year-old Ryand'r is one of first crew members Tigorr takes on in his freelance war against the Citadel.
now - 22-year-old Ryand'r joins Adam Strange's Omega Men to fight Lady Styx after the death of Broot.
There's actually a surprising amount to unpack with Ryand'r (sometimes called Darkfire in the comics, although we'll be skipping that.) He's always been a member of the Omega Men, but he's also meant to be Starfire's younger brother, and to have undergone the same experiments that were done on Kori and her older sister Blackfire, giving him the same powers.
We've chosen to make him an unremarkable Tamaranian youth that joined in the battle to free Tamaran from the Citadel. Without the torturous experiments that gifted the Princesses of Tamaran, Ryand'r doesn't have the ability to fly or to fire starbolts, but still has his alien strength and stamina, and is a great warrior from his time with the Warlords of Okaara.
He's a part of the Tamaranians that battled the citadel alongside Kori and Nightwing when they were brought into space to aid the revolution, helping to free Argent from her kidnappers and eventually helping to free Tamaran itself. Rather than staying on his home planet, he continues to battle the Citadel on other planets, freeing Elu and eventually joining the Omega Men.
The really interesting part of Ryand'r comes from his look. Starfire is always walking a very weird line with her costumes, because she's meant to be sexually liberated, but to a lot of artists, that means drawing her almost comically underdressed. Now we have a male member of the same species, and we suddenly get to see what that same costuming style looks like on a man. the result is often pretty funny, but at the same time, it raises a few interesting questions.
There are three pictures of the character on this page. The first is his traditional look, which mirrors Starfire's traditional costume, doing a fairly good job of making him look like a tribal warrior. There's very little to dislike there, but in the second picture, we see a version of the character from the comic based on the the animated Teen Titans series, where Starfire has long had a much more reasonable costume. This version of completely clothed, and it's hard to argue with the result. I'd like to imagine that this is a costume he's more likely to wear when he's away from Tamaran, while his traditional costume is something he wears into battle.
This last image is fanart of Ryand'r based on Starfire's scandalous and frankly poorly designed New 52 costume. It's pretty obviously gratuitous, but it's hard to deny that this is a genius piece of fanart, because he reproduces the costume on a male figure perfectly. If we have to suffer through Kori in that costume, then this is what Ryand'r would wear.