Was my prayer valid if there was a picture of a fictional character a few meters in front of me?

I was getting ready to pray Tahajjud early in the morning. I was rushing because I had to take a shower and Fajr time was getting close. There was a picture of a fictional non-human character 1 or 2 meters in front of where I usually pray. Since I was in a rush, I told myself I'll move the picture to somewhere else in the room after the shower. But when I finished my shower and got ready to pray, I completely forgot to remove the picture out of the way. I noticed the picture in front of me once tahajjud time was over. I understand that my salah will be makruh tahrimi, but was it valid? Was my salah useless? I also made a passionate dua regarding a hardship I'm facing in life. Was that dua also invalid?