UPDATE
I was reading past chapters and I came across this unusual thing that has been around for a while now "Bartolomeo's tattoos" but
here I gather all his appearances and put it in order so check it out.1. his entrance, he still have both of his tattoos (Normal mode)
2. his entrance, still have his tattoos (normal mode)
3. same as 1 and 2
4. He attack the audience (Attack mode)
5. one of his tattoos is gone (face-attack mode) but the other one is still there (chest-defense mode)
6. face tattoo is back while he commented about the shitty audience (normal mode)
7. both of his tattoos are visible (normal mode)
8. face tattoo is gone (Attack mode), Jack is gonna attack
9. shield protecting his body appears (defense mode)
10. face tattoo is back (defense mode)
11. face tattoo is in place (attack mode) but chest tattoo is gone (defense mode)
12. no tattoos (defense mode), I also assume that his face tattoo is gone in order for this theory to work (attack mode)
13. no tattoos as well (attack mode and defense mode)Now I'll break it down:
Bartolomeo's ability got to be a DF, no haki user can be capable of this sort of power where an aura protect his body, so assuming is a DF this is how it works.Normal mode: every time he is walking,talking or whatever he is in normal mode both of his tattoos got to be in place
Attack mode: when he is in a fight and he is gonna attack, he's face tattoo disappear
Defense mode: when he is in a fight and is being attacked, he's chest tattoo disappear in order to protect him for his attacker8. Jack is about to attack but Bartolomeo is in Attack mode and no in Defense mode and here is why:
He's defense modecan be detect itand a strong enough opponent may be able to punch him trough his shield, breaking the shield, so he have to be on guard because he don't know If Jack can break it
as soon as he realized that Jack won't be able to break it he goes Defense mode, as it seems in 10 and 11,apparently he cannot use both mode at the same timeapparently he can use both modes at the same time as seen on 13.PS: this is a theory and my own opinion, feel free to include any thought you may have and we can discuss it