The 29-year-old started all three games as the team exited the competition in the pool stages, but enjoyed notable highs along the way.
Fiji crashed to a 65-7 defeat to Canada in their opening fixture and further heartbreak followed in a 29-15 loss to Scotland, in which Komaitai scored the second of her side’s three tries.
They ended their campaign on a positive note with a 28-25 victory against Wales.
“It feels like a dream, everything happened so fast,” the forward, who became the first female soldier to serve in the Irish Guards, told SoldierSport.
“The international game is so quick and while it was exciting it was also scary – you felt like everyone was watching you. But it was a great experience.
“After losing to Canada we had to beat Scotland but were unlucky with some poor discipline and did not execute our chances to score.
“The try was great, but for me it is about winning as a team and that did not happen.
“Before the Wales match I said it was important to put everything behind us as it was our last week together. I was pleased we finished on a high.”
Komaitai only started playing rugby union five years ago through the army and has made rapid strides since.
She was invited for Fiji trials over the summer and won the Oceana Championships ahead of the World Cup.
“I played netball growing up and it was only when I arrived in the UK that my brother said I should try rugby,” she explained.
“I went to an army training camp, and the senior players and premiership girls who were there helped a lot. SSgt Jade Mullen (AGC (SPS)) was my role model – she taught me so much. If it was not for them I would not have had this chance.”
