Here are some research I made to write dialogues for the characters. I got the direction from the source of inspiration given by the person in charge of character design in our group, and I refer to some doomsday movies and games. I will list one reference example for each role.
Lily
In many games, there are heroines like lily. They are often in a state of self-confidence and struggling to survive. Their thinking is very independent, which may also lead them to show some rebellion against their loved ones, but in fact they still love and trust their families in their hearts.
When the family members of these characters are still alive, family members are the goal of their struggle and the source of their self-confidence.
If not as the protagonist, this role is generally the most suitable one as the opening guide in the game.
Furiosa: A Mad Max Saga
Arnold
This kind of role basically belongs to the identity of combat effectiveness in the game.They may not be the smartest in the team, but Their sensitivity to danger and risk is absolutely the highest, In the game, generally speaking, the risks perceived by such characters will come true with a high probability.
This kind of character will generally be careless, and their emotions will be clearly written on their faces. They often know human nature very well,
But like the previous generation, they also love their families, so if it is their family members or people close to them who make them angry, they may not directly show their anger completely, only will leave a sentence like “You will know that I am right then”.

Nam-san from the Badland Hunters, he is a little impatient, but he cares about his family wholeheartedly. Although he is a little rough-tempered, there is no doubt about his love for his family.
Patty
This kind of role is usually the one in charge of planning in the team. Although the fighting capacity may not be very strong, it can make a lot of contributions to the development of the team.
These people often have a setting that they are proficient in technology or a certain knowledge, and this setting will also make them look more serious about these aspects than others, that may seem that the behavior is simple or has a mysterious feeling, and they will feel happy and proud with the new achievements, even if the person he confides in may not understand what they are saying at all.
When people with good relationships deny or don’t understand the idea, they don’t show obvious anger, but only show slight depression and decide not to mention it again.
When I write dialogue of this character, I refer to the behavior of some old people of the same age in my life, especially my grandfather and grandmother. My grandfather used to be a scientist, . so I found some characteristics that this role might have from them.
They often talk a lot when they are talk about interested things, and they really do enjoy the explanation process, and proud of what they did, but at the same time they may lack self-confidence especially in front of their children, they will realize that they seem to talk too fast or too much after a moment of excitement, and then add a bunch of explanations.