H.C AKA Za-purple-DERP, one of my good friends and the owner of Shuriken-Stink Bomb, the ask account of Stink Bomb from Tumblr asked me if we could share this small head canon with Tuff Luck and Stink Bomb.
It says Tuff Luck liked Stink Bomb but got rejected by him after confessing to him, mainly because his sensei told him try not to find love because he is a ninja, and ninjas are professional killers and must be prepared to kill their loved ones, however, he is allowed to make friends, but he must always remember he might kill them one day, which made him aromantic.
Another reason why is that his past girlfriend Arctica AKA Moonlight was killed by Malefor and her death is also what made Stink Bomb aromantic. This broke Tuff Luck's heart. This is right before Wolfgang raped her and got her pregnant with Lucky Clover and Wolfborne.