Credit to Shizu_Mystia and UnitedWarriors most of these are in their format/details. However, I'm not including a few roles such as the Kittypet as I'm not overly sure how to work with them.
The Clan Team
Leader (1)
Your name will end in -star, and although an important clan member you do not have a nightly action. However, during the daily vote your vote counts as double.
Deputy (1)
If you investigate someone suspicious, you will be told what type of role they have, unless their role is unknown. You can investigate the same cat two nights afterwards again to try and guess what their role could be. You can investigate other cats in between.
Unknown roles: Sharpclaw, Brightheart, Sibling, Survivor, Copycat, Starspeaker, Heavenbound, Swift and the Lead Traitor.
Medicine Cat (1)
Your nightly action is healing another cat. You can heal one cat each night, and they cannot be killed by any traitor if you pick the right one. If they attack your selected cat, you will spot a physical trait of one of the traitors, although its up to you if you decide to share this. You can't heal yourself!
Medicine Cat Apprentice (1)
You don't have any night action and your name ends in paw. However, if the medicine cat dies it is your job to take over.
Starspeaker (1)
You may communicate with StarClan in your dreams and pick a dead cat to speak with (obviously not before night 2). This will not count as a nightly action as you are asleep, this keeps you hidden from lookouts.
Heavenbound (1)
You may pick a cat to resurrect once a game, although this happens in your sleep so the lookouts won't see it as a nightly action.
Lookout (1)
You can choose to watch any cat you find suspicious each night. This is a nightly action, and you will be told if the cat has a nightly action or not, but you do not know if they have an innocent action or a guilty action.
Lookout Apprentice (1)
You have no nightly action/abilities and your name ends in -paw, but if the Lookout dies/is exiled then you will assume their role.
Seeker (1)
Your nightly action is investigating two cats and seeing if they are on the same or different teams, however this different team could be innocent-neutral or innocent-traitor.
Seeker Apprentice (1)
You have no nightly action/special abilities and your name ends in -paw, but if the seeker dies/is exiled you will assume their role.
Cave-Guard (1)
You are the strongest cat in the clan, and you can protect one cat each night. If they are attacked by traitors you will take the attack for them, and see a trait of the traitors, it is up to you if you wish to share this information. However, if you protect a cat and are attacked for a second time, you will die.
Cave-Guard Apprentice (1)
You are a normal apprentice with no nightly action, unless the Cave-Guard is killed or exiled, in which case you will assume their role.
Sharpclaw (1)
You are an innocent but you are quite violent. You're a normal warrior most of the time, but if you suspect a cat to be a traitor you can kill that cat in the day, and your role will be revealed. However, if you were wrong and killed an innocent/neutral, you won't be exiled but you will have accidently betrayed your team and lost them a member.
Turnpelt (1)
Your only desire is to live, you are a normal warrior for most of the game. You will not be told that you are the Turnpelt until attacked by traitors, and if you are attacked by them you will join their side for the sake of survival.
Elder (1)
The elder is an innocent but they can choose to mute someone the next day, meaning they cannot comment on the next chapter. You can't mute the same cat twice in a row.
Rogue (1)
An innocent with a revenge kill that can only be used ONCE. Other than that, they are a normal warrior.
Warrior (3)
No special abilities/night actions, you work with the team to exile traitors.
Warrior Apprentice (2)
As an apprentice, your name ends in -paw, but if the other warriors are killed or exiled you assume their role.
The Neutral Team
Brightheart (1)
On the first night, you need to choose any two cats to fall in love with each other. (I would love to do LGBTQ+ but unfortunately I know there will be people who don't like it, so it would be a mxf couple). If one cat dies, the other will die of grief, the same with exile, the other will leave with that cat, traitor or not. You can't choose yourself!
Sibling (1)
You are the youngest sibling, and you must pick two cats to be your littermates. The siblings will know each others roles, and it is up to them if they choose to reveal them. If one dies/is exiled than the other two cannot perform their nightly actions for one night. If two die, the other will die of grief. If two are exiled, the other will run away to find them.
Copycat (1)
You must choose a cat to copy at the start of the game. If the cat dies/is exiled, you will take their role, but you will be a normal warrior until they either die or are exiled.
Swift (1)
NOTE: I created this role myself, if you use it please give me credit.
This cat is safe from attacks for the first time they are attacked, they are fast enough to run away. However, this is a negative consequence for the Clan team as no physical evidence like traitors or fur colours can be gathered that day if they flee. This won't happen more than once.
Survivor (1)
You are not a traitor, but you only want to live. If anyone, even an innocent, tries to visit you, they will die. If traitors attempt to attack, the weakest traitor will die. However, you are a normal warrior most of the time.
The Traitor Team
ALL TRAITORS CAN PARTICIPATE IN THE KILL-VOTE, NO MATTER WHAT THEIR ROLE IS.
Lead Traitor (1)
You are the leader of the traitors, the strongest and the most intelligent cat. As you are the head, your vote counts for double during the nightly kill-vote.
Traitor Lookout (1)
Similar to the Clan-Team lookout, your nightly action involves seeing if a cat of your choosing has a nightly action. You may investigate every night, but you must wait 2 nights until you can investigate the same cat again.
Traitor Lookout Apprentice (1)
Even as a traitor, you are still an apprentice so your name will end in -paw. You have no nightly action/abilities, but if the traitor lookout dies/is exiled, your will assume their role.
Traitor Deceiver (1)
You can choose a cat to frame as the traitor every night, and if investigated their role will show as a traitor.
Traitor Interrogator (1)
NOTE: I created this role myself, if you use it please give me credit
Once a game, you can force an innocent/neutral cat to tell you their role, to keep your role a secret this will happen through me without a mention of your cat's name. However, one of your physical traits will be revealed.
Traitor (2)
These normal traitors have no abilities other than voting which cats to kill.
Traitor Apprentice (1)
Your name ends in -paw, but you are the lead traitor's apprentice. If they are killed/exiled, you take their place. However, until this happens you have no special abilities/nightly actions.