The memorial is dedicated to the 30 Britons among the 38 killed in the mass shooting at the beach resort of Port El Kantaoui near Sousse in June 2015, and also to Sally Adey, a UK citizen who died in the Bardo Museum assault in March of the same year which killed 22 in total.
Suzy and Owen Richards lost family members across three generations during the beach attack carried out by Seifeddine Rezgui.
Speaking to ITV News, Ms Richards told how she felt "very proud of the monument, but also it's heartbreaking because you don't really want it.
"You wish this wasn't your life now.
"I'd rather have them all back here and not have any of this."
Ms Richards lost her father, grandfather and son in the attacks and told ITV News what the sculpture, titled Infinite Wave, means to her.
"Every strand is a life," she said.
"And so many broken families across this memorial, it's heartbreaking."
All the families of the victims of the two attacks were consulted on the shortlist of designs ahead of its construction.
Mr Richards also told ITV News of what it meant to see the names of those he had lost in the attack, on the memorial.
He said: "Seeing the three names together rather than being spread out means a lot because it kind of resembles how close we were as a family and what they meant to each other and meant to us."