While I know some people don't bother with the Rebellion rules for Hell's Rebels as they find it just one more bit of paperwork to keep track of that only one or two players gets into, I do consider it an effective framework from which to build NPCs that the party will regularly talk to. This provides plot hooks and a way of getting the group more invested in Kintargo... especially as if a team were to go missing, it's not just a group of nameless ciphers tallied on a sheet but instead a group of living and breathing people they're friends with.
One of the handy things about this is that you can also craft teams that make sense. For instance, the Revolutionaries can go from Freedom Fighters who patrol the streets to becoming either Cabalists, working within the secret societies of Kintargo, or Spellcasters who can cast 3rd level spells. Given that Forvian Crow and his crew can be recruited as Freedom Fighters but are described as a 1st level rogue and five level 1 warriors... it seems odd to think of this crew potentially casting spells (or becoming involved in secret societies and having ties to the aristocracy).
As an aside, both Cabalists and Spellcasters seem to be better suited to be Bonus Teams rather than an evolution of the Freedom Fighters. I don't quite know what would be a good fit for upper-level Revolutionaries. I'll have to think about it. Perhaps have the Poison Pen have a "mission" for the players to create a Bonus team of Cabalists, while the priest in charge of the Rose of Kintargo could help the players recruit a bonus team of Spellcasters?
Anyway, here's the first team I've fleshed out.
Peddler team
Name: Rag and Bone
1. Old Varisian Female Human Expert (Herbalist) Adria Cinczllescu
Adria is a recent resident of Kintargo, having fled Korsova during the Blood Veil plague that killed many seven years earlier. Having lost her husband to the Blood Veil, she studied herbal medicines for years under the guidance of a traveling alchemist, but when he was murdered she was stuck in Kintargo with nowhere to go. She's since started her own small business selling herbal remedies to the poor and needy, collecting herbs herself and then later with the help of Civian, a young teen she found alone on the streets.
2. Catfolk Expert (Merchant) Hobbs
Hobbs has wares and goods for sale. Hobbs is actually quite intelligent and cunning in business but likes to fake being a simpler person both to catch off-guard gullible specieists and because his ragular patrons like his "simple merchant" act and play along. Hobbs has lived in Kintargo for much of his life, his parents having been merchants as well but settling down when Hobbs started to get old enough to be a handful. When Hobbs was old enough to travel and settled enough not to cause fights they started traveling again, but he missed "home" and his friends, and chose to return to Kintargo.
3. Teenage Chelaxian male Human Expert (Artist) Civian Laeva
Civian was found on the streets by Adria, bruised and bloodied after a fight with local robbers which left him without any money, clothes, or memory of who he is. After Adria nursed him back to health she started to raise him as her own child and he showed considerable skill with a sketchpad. This talent proved helpful when he sketched a man who had robbed Hobbs and he provided proof of the richer merchant which resulted in the man's imprisonment. Since then he's taken to sketching all of the patrons so to make collecting debts easier and identifying people who aren't allowed to buy from Adria or Hobbs again lest they try to rob them.
4. Female Goblin Rogue (keeps an eye on stuff) Calvin
Calvin was one of three survivors of a goblin tribe that was wiped out by adventurers. The youngest of the three goblins, she didn't flee when the adventurers removed her from the cage where she was being kept and gave her good food to eat and taught her words and letters. Unfortunately, two years ago her adoptive parents died while adventuring and Calvin barely escaped with her life by using the lessons her oldest adoptive mother taught her. Several days later a starving Calvin came across a pair of traveling Catfolk merchants who brought her back to their son Hobbs back at Kintargo, and she's "kept an eye" on Hobbs and his friends ever since to make sure they aren't taken advantage of.
5. Female Chelaxian Human Fighter Cleo Sisennus
Cleo has considerable experience as a guard, having worked both for Chuko at the War Cage and more lately as a bouncer at the bar the Thrashing Badger. Fortunately for Cleo, she was back home tending to her ill daughter, when the bar mysteriously caught fire with everyone inside dying. She was considering returning to her old job of sparring with customers at the War Cage when she happened across the Silver Ravens and was offered a chance to fight back against Thrune and his associates by helping watch folk in the Rag and Bones. It helps that her young daughter has taken a liking to the goblin Calvin and she's starting to consider this crew to be a new family even as she struggles to make ends meet.
6. Male Tiefling Expert Craftsman Civilious Vestalis
Civilious is the bastard son of a Sarini nobleman who had a dalliance with a serving maid. When she ended up pregnant, her job was terminated, but she was paid off if she promised to keep quiet about who she had slept with. All she would admit was that it was a gentleman of the Sarini noble house. She used the money to apprentice her son with a local craftsman but partway through his apprenticeship she died under mysterious circumstances. Fortunately, the craftsman was impressed with Civilious's hard work and kept him on as an apprentice until his education was complete and he could make a living for himself.