input Search = includes keep returning Null

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i’m trying to create a input search to search for certain values in a array of objects fetched from a certain API… but each time i use the java script code it returns null

const search_input = document.querySelector('.input_search')
function searchCharacter() {
    fetch(api)
    .then(function(e){
        return e.json()
    })
    .then(function(data) {
        let characters = [];
        characters.push(...data) 
        search_input.addEventListener('keyup' , (e) => {
        const input_string = e.target.value
        const filterSearch =  characters.filter( e => {
               return  e.name.includes(input_string)

        })
        console.log(filterSearch)
    })    
})}
searchCharacter();

if i switched e.name with e.short_name or e.shortnames[0] i works just fine , but i need for the function too look up the name since they are more readable this img of the structure of the array
enter image description here

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