This interview is include in the Movie Material chinese fanpage somehow got their hand on it before it officially come out tomorrow. There are 18 questions in it, some of it are jokes, some are loreheavy.
1/ If Rider is absorbed by Sakura, will she turn into monster form? - N (Nasu): I think Medusa will not let herself turned, so only just blackened by the mud. She will get stronger, but not turn into snake or monster. In myth, Gorgon turn into hero killer come from her will, she lost herself and then turn into a human- eating monster. - T (Takeuchi): In short, she just Medusa Alter at FGO Prologue.
2/ Claudia and Kirei used to lived together for 2 years. What is their life? - N: a married couple treat themselve like guess, they talks a few time a day. Kirei told her what happen in the Holy Churd while Claudia listening in satisfied. - T: she like a holy maiden, their child must be an angel. - N: of course
3/ Shirou's Nine Lives Blade Work can defeat blakened Berserker while Archer -who stronger than Shirou- can not in other timeline. Is it because Berserker is nerf here? -N: Blackened Berserker lost his mind and his fighting ability. If it is normal Berserker, he can counter it by his skill, even Nine Lives -T: so that mean Shirou is lucky at that moment? -N: very lucky, because Archer arsenal show that he can do it in that state.
4/ For what reason the three family can join together? -N: Nakiri want to erase evil of humanity, Tohsaka interested in western magic and agree with Nakiri' idea, Einzbern also want to erase evil of humanity and reappear the Thirt Magic. Their assemble are from ultimate ideas. - T: where they meet? Magic Association? - N: Nakiri meet each of them first. The Einzbern is not in touch with the Association and the Tohsaka is not have enought condition to joint.
5/ What is Zelretch' work? - N: he make sure that any ritual relate to "Magic" is legal and intervent it if needed. Also the Association still not realize that these rituals is "for humanity", so it need to prove that "these ritual is justified?". Also if magic circus of Justeaze go uncontrol to the Root, he will deal with it himself. Zelretch is the only one Magic user on human' side and always take care of them.
6/ In HF, Angra Manju mentioned is All Evil of Humanity, is it the same with that Evil of Humanity Gilgamesh mention in UBW? If he is born, will Grand Servant summoned? - N: Necessary Evil born from a teen used as sacrified, so when AM used Holy Grail to gain servant flesh body, he can be seen as one of the Beast. To be exactly, he is Evil of Humanity "Retribution" (報復?), if he fused with Sakura, he will become BEAST. At that time, half of the world will be polluted and Grand will appear. - T: this will be told in Rebuild of Heaven' Feel new edition (I think this is just an Eva joke)
7/ Zouken true body is inside Sakura, does that mean he can hear every conversations of Sakura? - N: wait, can an old man stay awake 24 hours a days? - T: please, you can't violate grand daughter' personal space who is a high school girl... - N: actually, the "real" worn inside Sakura is like a soul container. Only when the body is destroyed, it gain his mind at that time, just like "sleep mode" of a computer.
8/ When Rin fight Sakura, Rin mention Zelretch but Sakura said she dont know him. So in Fate, how many mages know about Magic users? - N: if it is tradition mage family, they will teach their child about Zel when they still young. If it is countryside mage family or the lower class, they dont need to know his name. Instead they will teach about "the great wizard who used to lead mage world to fight still alive and live in Clock Tower". They will know about him when enter Clock Tower. When they reach Cause rank, they will know the other named Yumina. - T: Zelretch in Fate also is blood-sucker? - N: he is immortal, but not blood-sucker.
9/ Angra reaction about the fight between Shirou and Kirei? - Angra: Fight! Stranger, yeah (Nasu said he know nothing about good and evil at this point)
10/ What is Zouken plan to used the Holy Grail to eliminate all evil in the world? - N: Zouken problem also is the theme of Fate, he will used the Third Magic to tranform the Soul so it will no longer constraint by Body, no longer constraint by Evil. So, people will no longer be limited anymore and became "the container of every knowledge". He so desperated and think "This is the only way". - T: seem like Kirschtaria? - N: yes, Fate is always about the Third Magic. But his starting point are not the same as Kirsch-kun. One started with hope, the other started with hopeless, and so their end will be different.
11/ Can you explained how the Third Magic transmiss into the Einzbern and the original user of the Third? - N: the Third Magic lost because it user death at the hight before AD. The homonculus inherits thí ritual is decendant of Einzbern. These homonculus, it mind, knowledge and pure are higher than human so they keep inherit from the last owner. But, because they dont have soul, so they cant do the ritual. After 1000 years, they created a homonculus nearly indentical as the last owner and can reach the Third - Justeaze. But Justeaze is a error product, she can only use it one time only, so they have to create "the copy of Justeaze". After 500 years maintain her, her soul and mind are rotten, her memory only can contain 1 day memory, the next day she will forgot. A young Makiri with the hope to find the homonculus who can used the Third come to Einzbern caster in a snowy mountain. At that place, he meet "the Holy Maiden who Enternal Live in a Day" but still happy because she is a perfect holy maiden. Makiri convince the master of Einzbern, Jubstacheit to agree to the plan use Justeaze as Magical Core. Irisviel and Illyasviel was choosen 500 years after that time.
12/ Case File mention that the Third Magic is transmiss since 100 BC, and the First Magic user was born at the night before AD. So that mean the First Magic come after that? - N: the Third Magic exist since the year BC but disappear at the point when Age of Gods end. After 1000 years, only one can archived it is Justeaze. Btw, the Fisrt Magic is called the First is because of it's characteristic. (Yeah, he end it hear)
13/ In HGW5, there is always myterious disappear and dissater like the fire like 10 years ago. So when there is no Watcher form the Holy Churd, how they can clean the battlefield? - the Churd will immediately send other priest. First will be a friendly but unpredictable old man and can easily parley with the Association. Then they will send an angelly priestess with wicked tongue.
14/ How much for the puppet to use as Shirou's body? - N: Priceless, but she is the kind of "if she want smt, her purpose to work is money, but when she finally made smt, she will feel satisfied and toss it away" - T: so she wont said the price? - N: Touko will said "let me think... how about trade for PS5" - T: What! I want it too! (He just lose lottery)
15/ Using Archer's hand cause Shirou lost his memory? Can these memory be recover, or lost forever? - N: it is saif that it will be recover as "Soul Root?" on a higher dimension, so it will completely recover. Just like you can recover your data from cloud when your phone broke.
16/ After HF, there will be others grail wars in Case File? - Nasu answer that it can not, but Takeuchi joke that he can not just "ok, it end here", after all it have been 20 years since they started it.
17/ Is about Typemoon employee reaction.
18/ Is describe the hand of director Sudo