Thanks for your reply @calidris !
The character serves as a rescuer who brings children to the hospital. He brings the MC there and the leaves to bring others. My worry is that since he is the second character introduced it makes him look like a major character.
I have not decided whether he has a part in the climax but I know he will reappear towards the end.
Replacing or combining him does not make too much sense because it is unlikely the mentor (who serves as the MC’s doctor) would find her.
Based on what I have described, how would you perceive this rescuer character?