Rachel and Taiga are good friends (and then some), and while Taiga does help Rachel with her boxing training... he kinda fears spars since, well, he's not a boxer. He can surely fight and defend himself otherwise, but on Rachel's home turf he's basically a punching bag that is a really good dodger. 

Taiga is not Edward, but they are cousins. And, yes, whenever either of them say Shark they draw it out. 

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