I'd suggest 'Unlikely Allies: Ichigo and the OC'. This fanfiction creates a really interesting dynamic between Ichigo and the original character. The oc has different beliefs and powers which clash and then blend with Ichigo's. There are also great character development moments for both. Additionally, 'When Ichigo Meets the OC' is a fanfic that focuses on the initial encounter between them and how that encounter sets off a chain of events that shapes their relationship in unexpected ways.
Another concept could be the origin story of Dark Ichigo within the fanfiction world. It might be different from the original manga or anime, like Dark Ichigo being a result of an ancient curse that the OC is somehow involved in. This could lead to a whole new plotline where Ichigo has to not only deal with his inner Hollow but also the mystery behind it.
One great Hollow Ichigo OC fanfiction is 'The Hollow Within'. It delves deep into the relationship between the main character's original self and the Hollow Ichigo aspect. The OC in this story has unique powers that are slowly revealed as the plot progresses, adding an interesting layer to the Bleach universe.
One interesting 'ichigo dimension travel fanfiction' could be 'Ichigo's Multiverse Adventure'. In this fic, Ichigo travels to different dimensions where he encounters various versions of his friends and foes. He has to adapt to new powers and rules in each dimension.
One interesting ichigo x oc fanfic is 'The New Soul Reaper'. In this story, the OC has a special power that catches Ichigo's attention. The author does a wonderful job of building their relationship. It starts with a bit of misunderstanding and then develops into a deep friendship and something more. There are also many twists and turns in the plot.
I'm not sure of the exact name, but there's a fanfiction where female hollow ichigo gets separated from Ichigo during a battle. It then follows her own adventure to find her way back to him, while Ichigo is also searching for her. It's a story full of action and their unspoken bond.
Well, I know a fanfiction named 'Twilight of the Ichigo'. In this story, the author vividly depicts the psychological struggle between Ichigo and Dark Ichigo. It also involves some other characters who are affected by this internal conflict. Another fanfiction is 'Eclipse of the Self'. It shows how Ichigo tries to come to terms with his dark side, which is full of twists and turns.
One great 'ichigo hunter x hunter fanfiction' is 'The Crossover Quest'. It combines the unique elements of both series in an exciting adventure. The characters from both universes interact in a really engaging way.
One interesting plot could be Ichigo facing a super - difficult in - game boss. He might use his unique skills and strategies to gradually wear the boss down. For example, his sword - fighting skills from his regular combat experiences could translate into some cool in - game moves.
One idea could be that the OC has a special power that only activates when in close proximity to Ichigo. For example, the OC can sense Hollows from a great distance, which helps Ichigo in his battles against them.
One interesting ichigo and kisshu fanfiction is 'A Forbidden Bond'. It delves deep into their complex relationship, exploring how they might interact outside of the main storyline's constraints. It has great character development and some really touching moments between them.