The Canon Player's Dilemma
You love Gojo Satoru. You want to write him in RP. But the moment you post your first reply, someone will tell you "he would not say that." Playing canon characters means accepting that other fans have strong opinions about the character you are portraying. That is just the deal.
Staying True Without Being Rigid
Study the source material. Understand your character's core motivations, speech patterns, and values. Then give yourself room to explore. Roleplay is inherently "what if?" territory. Gojo in a coffee shop AU does not need to act exactly like Gojo in Shibuya. The essence matters more than the script.
The OC in a Fandom World
Original characters in established universes face different challenges. The biggest: being dismissed as a "Mary Sue" or feeling irrelevant next to canon powerhouses. The fix is positioning. Your OC does not need to be stronger than Naruto. They need to be interesting in ways Naruto is not.
Bridging Canon and OC
The best fandom RPs weave canon and original characters together naturally. Canon characters provide the familiar framework; OCs provide the unpredictable element. On CharHaven, use character relationships to link your OC to canon profiles and show how they fit into the established world.
When Disagreements Happen
And they will. Someone will not like your interpretation. Someone will call your OC overpowered. Handle it gracefully: listen to valid criticism, ignore bad-faith complaints, and remember that roleplay is supposed to be fun. If a partnership is not working, part ways politely.