u/Evadoesstuff

We already know that the Color/Sin affinity of the skills on a id relate to one status. For example, Index Faust has a Pride skill and a Gloom skill because she uses Poise and Sinking, so it is easier to build around teams with those keywords.
However, I have curiosity about if there is more lore behind it in different ways:

• What do you think about the skills that not match because they dont use that keyword? Index Faust has Sloth too, why is it? Is there a reason or it is just random?
• Some ID's have multiple skills with the same sin. Firefist Gregor is probably blind of rage, desiring to destroy all the bloodfiends, and Middle Heathcliff; well, its the Middle, envy resonance vengeance team. But at which point does an ID start to have more than 1 skill with same sin?
• Does placement of the sin matter? My theory is that Skill 1 means low but frequent bad activities and Skill 3 are big destructive crimes, but i am not completely sure.
• What about those ID's whose skills dont relate partially or totally to their gameplay? W Hong lu is Rupture and Charge ID, but lacks Envy. And this is not only on very early IDs, Zwei Ishmael has 0 Sloth even if her only has Tremor. How???

I am genuinely curious and would love to hear the opinion of the people about this topic, so please, even if it is a small headcanon or a scholar thesis, give me your thoughts.