Teach is also most likely Buccaneer, but the different one. The one who refused to believe the sun, instead we can see his childhood crying under the moon. Probably got hunted thanks to his special bloodline during early of his life until he joined Whitebeard pirates.
Archeology is his hobby according to the data, he must be know something (or a lot of things) about Joy Boy, Nika and the sun. Being a D clan member and buccaneer shaped him into powerful individual. I also suspect him for born without having conqueror haki. All of his pain for being a D, a buccaneer and knowing only the chosen one are gettin the conqueror haki, he set his own goal with his own plan.
Every weakness comes with strength, just like weakness of the sea comes with the power of devil fruit, he realized that despite all bad things that he get since he was born, he also has the ability to hold two powers. To use this advantage, he need to be specific. Two powers he has now most likely represent two of three power of ancient weapons.
Not sure he is a Bucaneer, we already know that Kuma is a Bucaneer and when Saturn spoke about Teach being special, I don't think he'd have called it special if it was a race that we were already aware of.
Teach is also from a race where:
- He can't sleep, he's awake 24/7 and has never slept in his life.
The image with him crying under the moon is probably referencing the fact that being awake 24/7 would make it a lot more obvious that you're alone especially if he was abandoned, so it makes sense from that perspective that he is crying.
- He also feels twice the pain as a normal human being implying he's probably got 2x the receptors of a normal human being.
- Luffy also referred to him as they implying he's not 1 person physically.
More so, we know that a DF can only be consumed by 1 person, and if Blackbeard is 2 people physically, then it explains why he can consume 2. Marco also said his body was different, so it's not really weird to think of Blackbeard as 2 people physically in 1 body.
If it's 1 DF per body, then Blackbeard possibly having maybe 2 hearts or the anatomy of 2 people in 1 body... I'd assume that's why he can consume 2 DFs.
Either way, everything about Teach so far doesn't seem consistent about anything we know from about Bucaneers.
- Kuma is 22 feet tall, and was compared to Whitebeard in height who is 21 feet tall.
- Blackbeard is 10 feet tall, very different from Kuma who we know to be Bucaneer, that's a huge difference in height.
I'd imagine Blackbeard is probably from a different race that's yet to be revealed. I don't see why Oda wouldn't have specified in the latest chapters and kept it secret if he was a Bucaneer, but maybe he is but highly doubt it.
Maybe he is from some Chimera race that's probably extinct since he is an orphan.
Being a D. also doesn't mean you know anything, even Law doesn't understand anything about the D. clan. Robin herself doesn't know much about the D. clan. So, I doubt even Blackbeard knows much. All she knows is that D. clan members have played a significant role in history. No one probably understands the significance of being a D. other than those who went to Laughtale with Roger, and people Roger told about his findings such as Whitetbeard.
I also suspect him for born without having conqueror haki. All of his pain for being a D, a buccaneer and knowing only the chosen one are gettin the conqueror haki, he set his own goal with his own plan.
Blackbeard was 12 years old when he decided to join Whitebeard. There is no way a 12 year old figured out if they had Haki or not especially when he probably wasn't a skilled combatant at the time, so I highly doubt he sat down and decided that since he won't have King's Haki, he needs a DF. You can't plan to have it or not have Conqueror's Haki.
Even Zoro didn't know he had Conqueror's Haki until Wano... he is 21 years old, took him 21 years to figure out he had Conqueror's Haki and it took Luffy 17 years.
There's no way a 12 year old determines they definitely don't or won't have King's Haki.
The only thing we know he planned for at the age of 12 was to acquire the Yami Yami no Mi by joining Whitebeard's crew.
Teach fought Shanks when Shanks was 26/27 years old when he was already an extremely powerful Pirate with King's Haki. He fought Shanks before he met with Luffy. Shanks was already known to be fighting with Mihawk often.
Someone that could have fought someone like Shanks who is also equal to Mihawk... Teach is highly possessing Conqueror's Haki.
Another thing is Chinjao said that only those with Conqueror's Haki can be Pirate King, and he believed the Blackbeard was the only one capable of becoming Pirate King suggesting he probably has Conqueror's Haki.
For years, people thought Blackbeard didn't have Haki until he proved he did against the Seraphim. There are somethings people should just be assumed to have when they're amongst the strongest in the series.
We don't need to see Mihawk or Rocks or Shiki or Kong using Conqueror's Haki to reasonably assume they have it. You can't be at the very top of the food chain and not possess it.
Blackbeard gets severely underestimated for the simple fact he comes off as a coward and uses under-handed tactics.
Only thing I do agree with is he's probably one of the most educated characters in the series being that he has never slept, and likely has a good chance of having spent most of his time reading.