Marry - or sue him for sexual harassment and get the money that way. Or, she planed to say she have child with him, no matter if true or not. But in any case, I doubt anyone would be surprised if she got the money, so yes, good host.
(I suppose even the marriage is an occupation hazard for woman who try to sue for sexual harassment.)
Susan got into the group by dint of being Sarah's best friend, not solely becuase she knows Nanase.
That's not what he has been told. The power to bend worlds to his will doesn't necessary mean ability to change history (also, specifically said to be impossible in EGS, as Scotty reminded). That said, the speculations are funny so I would comment:
Would be funny if Tedd met Elliot in ASMA dojo because Noriko would pressure him to do some martial arts.
ESPECIALLY likely if Noriko would realize ASMA dojo works.
Tedd would be unlikely to be good in it anyway, but it would be another group activity ...
Remember it will be TEDD doing the changes. He would certainly make sure there will be some other reason why he would end up with TF gun - he might overlook some things but he would definitely pay attention to this one. Especially considering TF gun was reason why he started researching magic which lead to him finding out being Seer.
Convincing his father would likely be harder, but on the other hand, maybe non-shy Tedd would be better at convincing. He might however be stabler and not experiment on friends so much, or at least test it first.
Alternatively, it might be NORIKO who would totally support Tedd getting TF gun as way to give him some way to compensate for his lack of magic abilities.
First, why should it happened with different outcome? Second, again, Tedd would pay attention to Grace. Third, Grace might have other reason to end up with Mr. Verres. But it would be truly interesting what would Noriko's opinion on her son practically marrying alien shapeshifter be. Would she welcome shapeshifter in family or would she worry about her grandchildren having harder access to magic? Would it MATTER to her with Tedd not having magic according to tests?
... would Noriko have other child meanwhile?
Main reason for Ellen is Magus. I already mentioned that TF gun would likely stay. It would be more work for Magus to convince stabler Tedd, also with Noriko in picture it's less likely Tedd would be alone home to have opportunity to go for DD ... unless, of course, Noriko even when technically home would be out of work even more often than Edward, which is quite likely, so ...
I think he WOULD adopt Noah BUT he would make sure Noah and Tedd know each other. In fact, without Noriko leaving, Adrian would take an active role in forming and training main eight equivalent.
Wait. Maybe Grace would still arrive at Edward's house but it would be NOAH she would start dating.
Or, alternatively, she would find and kill Damien AFTER his attack but long before the story, recovering Grace and her siblings. Which could ALSO end up with Grace being Tedd's adopted sister - especially if Tedd would pay attention to Grace when changing reality but forgot about Westermarck. The probability of Grace dating Noah RISES.
Also, better relationship with Sarah and less shy Tedd in general might mean Tedd will be dating SARAH.
And you forget that IF Mrs. Kitsune opinion on Noriko was result of her abandoning family, they might be still on speaking terms and Nanase and Tedd would be closer.
I think he does have magic ; however, I think he has considerably less magic than Edward, possibly not being wizard, which leaves the factors in behaviour you spoke about.
I already said that his reason for not liking Adrian Raven might be that he is jealous he didn't had so good teacher when young ; especially if he blames his teaching and not his lack of talent/affinity for his limited magic.