Does it seem to you that Chao and Li Xiu is a couple? If Hikaru and Kenjiro didn’t sound Japanese, I’d even say they are a one big Holy family (almost said ‘yellow’ but I don’t need that PC nightmare on my hands).
Also, I think Clarissa and Layla look alike. Obviously Pandas and Rabbits are together.
Who else do you think are conceived as somewhat related heroes?