Archer does provide some insight into the spells, sharing freely about the way it affected the forest, as well facts related to the origins of his possessions. He says that it occured to him that providing intact copy of the dolls and charms, as well as photos of dissected ones, may help to find out its origins. He also inquires as to who may possess such knowledge, since it seems not possible for humans to obtain it. As for the unknown symbols he says that in his god's opinion, as well as in his, it's the main component of the spells, and that his efforts to decode it has been in vain, and that no one has been able to identify the language.

He is all too happy to discuss the aspects of the magecraft he knows and how it relates to shinki magic.

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Yes, Archer would definitely break into Mitsui's house, with Ginia's help. He'd search it thoroughly, make photos of any address books or similar things, personal belongings especially photos. Ginia would attempt to hack Mitsui's computer, although she has enough tech knowledge to know how to steal data and figure out passwords, but she's not a tech expert. She would also check for hidden electronics using her nanotech.

If there are any charms, spell tags or similar items Archer's goint to take a few, as well as snap some photos just in case. He's also going to analyze the molecular structure of said items (regarding it, he also has charms from department store fire that supposedly include pieces of plastic. Is it the same kind that is included in the charms? What can he find by analyzing it?}