Transcript for The 'Angel of Manchester' kept children safe during chaos

Finally tonight, from here in Manchester, you can see the vigil here behind me as we stand here in Albert square where thousands came here today to send the attacker a message. Tonight, a message from Manchester -- "We are strong." As stories of heroism now come to light, like Paula Robinson, hailed as the angel of Manchester. This big explosion just went off, so we came out the fire exit and as soon as we came out, we were directly at the bottom of the steps to the arena. Reporter: She saw crowds of teenage girls running from that arena -- I just shouted, "Everyone, just make your way to the holiday inn." Reporter: -- Bringing dozens of young girls to safety at a nearby hotel, calling their parents for them. Then I put on social media, "Everyone make your way there if you're missing children, I've got children there." Reporter: There are other stories emerging here, too. Cab drivers offering free rides. To get the young people out quickly. God only knows what these people were feeling like. Reporter: And that hashtag -- #roomformanchester -- hundreds of residents near the arena offering shelter, food, comfort. We only live around the corner so we just wanted to see if anyone wanted a place to sit that was warm. Reporter: And today, people telling me they will move forward. How do you process what has happened here? Haven't really. It's horrible. Reporter: And there was the little boy wearing the tie and what his mother told us, hoping the future will be better for her sons. What do you hope. I hope the world will get better as he grows up and people can start to learn this isn't going to change the way people live. We all hope for that Thank you for watching here on a Tuesday night. I'm David Muir. I hope to see you here

This transcript has been automatically generated and may not be 100% accurate.