I like the idea that Aventurine will only risk himself 3 times in a bet before stopping. Or just in general his believes in the power of three. Because "may the mother goddes thrice close her eyes for you." Even if he's doubtful that the goddess exists, he can't deny his luck and is lowkey still superstitious. For example:
That one ratiorine lightcone 'Final Victor', he only pulls the trigger 3 times
In his talk with Sunday, he uses 3 bargaining chips (Jade, Topaz, and his cornerstones)
In Penacony he escaped death 3 times; (1) Sunday didn't manage kill him (17 system hours left to live), (2) Acheron didn't kill him (he managed to escape the nihility space), (3) Constance didn't manage to kill him (Argenti saved him from dormancy memory zone)
In childhood he only had 3 possessions (father's shirt, mother's lucky charm, mother's necklace)
In the boundary, he was guided by 3 voices (Ratio, Acheron, his younger self)
Also in dreamscape area he talked with 3 versions of himself (past, present, future)
The final stage's actors were of 3 beings; a stoneheart, a stellaron, an emanator
His earring has 3 feathers
His skill shield lasts 3 turns
His ult debuffs the enemy for 3 turns
One of his inherent skills (Bingo!) gives him blind bet points 3 times when another character does a fua
All that to say I personally believe in Gaiathra Triclops because the luck of 3 (and just in general how everything relating to him is related to the number 3) is too strong to be anything other than real.
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