The father of Anastasia Kriégel has told the Central Criminal Court his daughter had some issues in school and had set up fake accounts bullying herself.
He also told the court she was happy as she left the house for the last time with one of the boys accused of her murder.
Patric Kriégel was giving evidence in the trial of two teenage boys who have pleaded not guilty to murdering 14-year-old Anastasia in Lucan almost a year ago.
One of the boys has also pleaded not guilty to violently sexually assaulting her.
Mr Kriégel said he was retired and had a lot of free time to spend with Ana. He said she was a very happy child in general and was excited about going to secondary school. But he said that changed and she became stressed, which was not like her at all.
He agreed she was being bullied and said she would come home with stories that were not very happy.
He agreed with prosecuting counsel Brendan Grehan that because Ana was a little bit different, people treated her differently and called her "weird". He said she was "herself" - someone who was "full of fun".
He said she would often be disappointed by the way people reacted to her. She tried very hard to make friends but might sometimes say the wrong thing.
Mr Kriégel said there had been issues in school. Ana told her father she felt invisible and started to engage in attention-seeking behaviour. He agreed that she set up fake online accounts, bullying herself. He said the school discovered them and Ana owned up to them.
Mr Kriégel said Ana loved listening to music and loved going out walking with her headphones on.
He described hearing the doorbell just before 5pm on 14 May, 2018. He saw Ana whispering to someone. She went upstairs quickly to put on her hoodie. He told her that she was supposed to be studying.
He said Ana replied "no one told me that". She told him she would not be long and he believed that she meant it, but she did not tell him where she was going.
He said he would normally ask her where she was going but had forgotten. He said she gave him a big smile when she left. "She was happy," he said. He looked out the window and saw Ana and one of the accused boys - Boy B - going in the direction of the park. He said the boy was wearing a small backpack on his back.
Mr Kriégel was shown photographs taken from CCTV of the two teenagers taken very near Ana's house. He agreed that Ana was about three steps behind the boy and said it was obvious they were not in conversation.
