Some one who is nogunz who wants to be gunz. But they are autistic so can't pass background check so must buy airsoft raifus then post to /k/ bragging about muh raifu
Although "aishiteru" is the Romanised form of the Japanese for "I love you", it's worth noting that the word isn't actually used very often in Japan.
Its most common usage by far is amongst weeaboos (see also wapanese) where you'll almost always see it spelled with the Roman alphabet like it is here.