I've got 99 problems,

1. Does your character like their name? How was it chosen? Would they choose another if given the opportunity?
Yes, they like their name and they won't choose another. To be honest, I have no idea how Kais get their name, Akira Toriyama probably thought Zamasu would fit well with the name of his master Gowasu since both names are a play on 'to be/to exist' in some way.
2. How does your character generally show affection?
Zamasu doesn't.
3. What is your character's favourite place in the world? Why?
Zamasu likes places that are quiet and with a lot of nature.
4. What is your character's least favourite place in the world? Why?
Anywhere mortals are. He hates mortals and their presence disgusts him.
5. Does your character have an accent? What does it sound like?
No. Zamasu speaks in a very correct and formal way.
6. How would you describe your character's anger? Does it blind them, or does it clarify things?
This dude has so much anger in him that it cannot be healthy. But he is the type that keeps his anger inside so that it can stew really nicely but it is also an anger that motivates him. Since there are three versions of him in canon it is good to understand that only one of them has actually acted on his anger and head out to convince a future version of himself to do the same. The one I play was going to but got killed before he could start his shit
7. What defines your character's goals? Do they have ambitions for themselves, the world, their loved ones, or are they just coasting?
Zamasu has a very strong belief which is also the core motivator for his actions. He is a straight up misanthropist and narcissist. His primary goal is a cosmos without mortals and him being the one, true god who gets to oversee all of that.
8. What is the best way of earning your character's loyalty?
If you are green and your name is Zamasu and it would be super handy if you'd hate mortals.
9. Does your character like to be touched? If so, how?
Only Zamasu is allowed to touch Zamasu.
10. If your character could change one thing in their life, what would it be?
From the canon point I play him that would be the passive role Kais play in the entire pantheon of Dragon Ball gods. He would like to be way more involved and he would like to punish mortals for the mistakes they make in the eyes of their creators (the Kais)
11. What event in your character's life do they feel the most guilt over?
Zamasu doesn't feel guilty at all.
12. How far would your character go for what they believe in? Do they believe the ends justify the means?
Far. Very, very, very far. Like massive genocide over 5 different timelines-far. And yes, Black is pretty much the perfect example how the ends justify the means. After all, for a god who hates mortals to take an actual mortal body...
13. Is your character impulsive, a planner, or somewhere in-between?
A planner.
14. How good is your character at seeing things from other people's perspectives? Is there an example of a perspective they were unable to understand?
He is absolutely horrible at it and he's not going to bother trying either. The only perspective that matters is the perspective of Zamasu.
15. Is your character good with smalltalk, or do they jump straight to more serious matters?
Zamasu sucks at smalltalk. You get no talk at all or a serious speech about the many effects of his judgement on mortals and how superior a god really is.
16. What are some physical tells of how your character is feeling at any given moment?
Zamasu doesn't have a very expressive face. But it is obvious when he's mad, disgusted or happy. Regarding his body language...he is difficult to read.
17. Is your character artistically inclined? Howso?
Nah even though I think he can do killer calligraphy. Still, if brewing tea can be considered an art, Zamasu is quite very much the best.
18. What is your character's taste in media? Do you feel it reflects upon them as a person?
Well, he knows how to browse the godly internet and check out GodTube. He also uses it to get the information he needs about Goku. But I see Zamasu as more of a bookish person.
19. If your character was in dire straits, who would they turn to? Why?
Zamasu would turn to Zamasu.
20. Your character is now on the run! What items do they bring with them?
Some Time Rings, probably. And one of Gowasu's earrings. Better to wreak havoc in a multitude of timelines
21. What is your character most insecure about?
Zamasu isn't insecure about anything.
22. How strong is your character's sense of identity? Is it ingrained, or is it bound to the things they do?
Oh, he knows who he is and what he is. He is a traditional Kai who studies under one of the highest ranked gods in the universe to take over that position eventually. And it shows in everything he says and does. He is hella cocky and likes to tell everyone what he is and why they should respect that.
23. It's [insert holiday here]. What does your character's ideal celebration look like?
He doesn't celebrate any holiday.
24. How observant is your character? Do they tend to notice small details about others, or do they tend to be more self-absorbed?
Zamasu is extremely self-absorbed. He does not care about others unless those others are himself. He won't notice small details.
25. What brings your character comfort?
Silence, a good cup of tea, dead mortals