<div id="app">
  <form action="#">
    <label v-for="(image, index) in images">
      <input type="radio" name="witch" :value="index" v-model.number="indexOfImage"> {{image.name}}
    </label>
  </form>
  <div class="image">
    <h3>{{images[indexOfImage].name}}</h3>
    <img :src="images[indexOfImage].src" alt="">
  </div>
</div>

.image {
  border: 1px solid #000;
  display: inline-flex;
  flex-direction: column;
  padding: 15px;
  margin: 10px;
  img {
    max-width: 250px;
    height: auto;
  }
  h3 {
    margin: 0 0 5px 0;
  }
}

const app = new Vue({
  el: '#app',
  data: {
    images: [
      {src: 'https://i.pinimg.com/564x/c6/5c/33/c65c33c15d9bc91ca228df382a2198b2.jpg',
      name: 'Triss'},
      {src: 'https://dc-marvel.ru/wp-content/themes/polygon/cache/webp/9af6784092a930b7b7fc8df3e33214c0.webp',
      name: 'Yennefer'}
    ],
    indexOfImage: 0
  }
})