Tommy- Main Character -You'll see ;)-
Philza- Avian
Tubbo- Goat hybrid
Schlatt- Ram hybrid
Wilbur- Avian (without wings)
Nikachu- Shapeshifting
Puffy- Sheep Hybrid
Techno- Piglin hybrid
Dream- God like complex
George- Danger sense
Sapnap- Control fire
Ranboo- Half enderman, other half unknown
Karl- Time travel
Fundy- Fox hybrid
Eret- GaY (That is literally his personality and powers)
Quackity- Location tracking
BadBoyHalo- Demon (Wings too small to fly)
Skeppy- Diamond Curse
Sam- Creeper Hybrid
Jack- can see magical presence
Punz- Healing
If there is a character not listed then assume they are human.
I will probably not mention them anyway. I only watch a few Dream SMP members so not all characteristics will be accurate.