@@LegoWormNoah101 or Bulls Eyes from Season 4 where he had Percy's Season 3 whistle (his normal whistle pitched down by 2 semitones). He also had a whistle in the RWS.
Like I said, nothing special about their character. No flaws, no personality, therefore no material. I think Brenner himself didn't like this surge of one-off characters from the HiT era.