I believe Springer Damsels are safe. I would like to get one myself but would like to make sure they aren't aggressive due to past experiences. Damsels are entertaining fish to watch, they are very active swimmers and graze all day.
I had two blue devils to start off my tank, and it was a nightmare. One was very aggressive towards the other. I came home one day and found the passive one stuck in a corner of the tank ready to die. I ran to my LFS and got a breeder box and threw him in it. These are very hardy fish and I was able to nurse him back to full health. Threw him back in the tank and same issue with the aggressor. So I ended up separating the tank with some egg crate in hopes they would figure it out. One day I came home from work and saw both swapped sides. Well, the aggressor would force himself under the sand and the egg crate to wedge himself under to get to the other side. He was determined to kill the other damsel. Tore down my entire tank to catch the little demon, and I rehomed him. I kept the passive one, but he started to attack newcomers, so away he went as well. This time what I did to catch him was put a cube of mysis in the breeder box and he jumped right in lol.