No Specific Information Found for 'I was Reborn in a Fantasy World with a Cock as Long as the Name of this Game!' Best Characters

Based on the conducted web searches, specific information pertaining to a game titled "I was Reborn in a Fantasy World with a Cock as Long as the Name of this Game!" and its 'best characters' or related gameplay guides could not be found. The search results did not yield any direct wikis, reviews, or strategy guides for a game with this exact title. Therefore, it is not possible to create a comprehensive guide on its best characters, tips, strategies, or builds based solely on the provided search results.

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Therefore, a guide on the 'best characters' for "I was Reborn in a Fantasy World with a Cock as Long as the Name of this Game!" cannot be provided at this time.