Husky's much more introverted than his casting persona. In the second TGS podcast, when asked why he's being so quiet, he mentions how he naturally "conserves his energy". He talks about how he'll lie dormant in a conversation until a topic he's interested in comes up, and how at events he spends most of his time alone. I don't really remember the wording but for everyday conversation it sounded strikingly similar to descriptions of mtbi introversion.
I don't see any of that as inconsistent with extraversion, particularly if it's in an In-Charge person.
As for Day9, have you seen his 100th Daily? The incident he mentioned where he trashed his room, and the lesson he shared about learning not to be scared and suspicious of your emotions, as if they were alien and dangerous (possibly from a different Daily) makes me think he's inferior-Fe. I'd probably have guessed ENTP before.
I don't think any of that is good evidence for type. I think it's better to look at the whole personality rather than random, largely irrelevant details like that. Plus, did it not occur to you that the fact that he was talking about his emotions at all is pretty F? I'd never imagine someone like, say, IdrA getting that personal if he did what day9 does (which is why he'd probably be a big time failure at it.)
Why do you think he's ENFP? I can't see him as anything other than NTP.
1. He clearly has a GtG (get things going) interaction style. I don't think that's debatable, and that alone rules out INTP, or any other introverted type.
2. He seems oriented to people more than things, which indicates F over T.
3. He's super idealistic about esports, which is why he's seen as being an inspiring pioneer of the field.
4. He seems to do that NF thing where they view life in narrative fashion. If nothing else, the man loves to tell entertaining (and sometimes very personal) stories. He's even been known to tear up!
Oh, and this isn't as solid, but IME the difference between ExTPs and ExFPs (who all seem to be inclined to a sort of obnoxiousness, to varying degrees) is usually that the latter are goofy and largely non-offensive while the former have a tendency to be trolls. Day9 would certainly fit the goofy, non-offensive type, which is why he's universally liked.