tattoo ideas for men arm

Help me with a tattoo idea involving the family?
This will be my 5th tattoo and by far my most significant. I miss a tattoo that represents me as the man of my family. I consider my family close to my mother and my 2 sisters, I want an idea quite unique to me to be there to protect them sort of, please help! I'll get this on my arm, probably my shoulder and come on my biceps
me and my sisters went to get tattoos altogether. I'm 25 on the left side of my sis stage 16 on the right and my sister was 9 on his left. Was really a special evening


