Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Soft and cuddly I'll pull on your heart. But take my last name and I'll tear you apart.
Digital white-out.
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
In my life I must bare my bloodline I must share.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?