[Inconspicuous Kitty]

1. Although it is not represented mechanically, is it possible to utilize Grand Summoner's Soul Chain to a willing recipient, and provided willingness on behalf of the involved parties, would they be able to recieve benefits from that Youkai (evoke passive, evoke active, install ability)?
1b. If so, which of the parties (the summoner, youkai, and recipient) would need to be a willing member to have such an exchange occur? The Summoner and Youkai alone, or all three, or a particular combination thereof? If not, is there any such method to make a similar interaction possible?

2. What, exactly, are the foxfires surrounding a redtail, and how do they come about when their numbers switch?
2a. What makes these foxfires seemingly appear during combat, specifically? Or hostile situations? In other words, what is the criteria for them suddenly deciding to pop up at all?
2b. Are they tangible in any manner, or illusory?
2c. Is there any similarity between them and Seeker Flames that come from Firefoxes?

3. Youkai disappear to Summoner Doors when desummoned, yes? Is it possible for them to claim a specific spot in said summoner door, such as a little nest that they claim as their own, and return to specifically when desummoned?

4. Are Youkai capable of summoning themselves near their summoner, given sufficient reason to do so?