There are other people wearing tseldora robes (Especially if you play on NG+ and get extra phantoms) It's not a unique outfit.

The descriptions say what happened. Your bullshit involves ignoring the lore, and then making shit up. You are just writing fanfiction.

In DS1 we learn that the flame turned the witch into a bug. the lost sinner followed in her footsteps and became a bug. The bug peeks out of the prisoner's mask, then recedes back in and springs the prisoner to life. You can also SEE the prisoner and LOOK at them. The bug is the sinner, because DS1 lore establishes the bug element of the flame. I already said this. Don't just ignore half my post and then put your foot in your mouth.

The bug was contained. Did you think about the sinner's rise for ONE SECOND before saying that? LOOK at it. take a minute and just GO THERE ingame and look at the sinner's rise itself from the bottom to the top. Sinner's rise is a prison at the bottom of a salt fort with a huge elevator, surrounded by water. The bug has no way to protect itself without a host body, and is therefor contained within sinner's rise. (Also, the sinner is punishing herself for her sins)

The old soul made his soul great, he had the soul before falling into the lava, just as all the bosses did. It's what lead him down that path and gave him a great soul. Check Old Iron Clad Armor's description. And again, the soul is a REMNANT. It doesn't lurk, it doesnt DO things. Otherwise the soul would have turned you into a big fire dragon.

No, the soul doesnt lurk below. THINGS lurk below. UNKNOWN THINGS. You also just turned a PLURAL into a SINGULAR. Words MEAN things when you SAY them. If I say "I have Apples" it doesn't mean "I have one apple" This is kindergarten level reading comprehension here. If you can't keep a single word consistent from the beginning of a sentence to the end of it then why are you even talking to me?