Final answer:
Marlene's father is described as caring and gentle in the beginning of the story.
Step-by-step explanation:
In the beginning of the story, Marlene's father is described as a caring and gentle person. In the passage, it states that he arrives at the house carrying a boy who is expiring in his arms, showing his willingness to help and save others. The use of the phrase 'a white rectangle of light and grief' further suggests that he is emotionally affected by the situation.