Katsuya
Magical artist
XD Yes, because Merman!Chenglei is a figment of Kenren's imagination. Oh! Maybe in the beginning when Kenren is getting to know the merman, he would notice that both him and the hand that keeps bringing him ramen have the same threaded bracelet?...Oh, he would connect the dots, because the merman would have the courage to say it outright compared to the real Chenglei.
I just imagined the first thing Chenglei would say in the ramen bowl.
Chenglei: I-I li-lik' ya, Ken'en! *blushes bright red while holding onto a naruto fishcake.