pronama-and-conoha.css

#pronamaChan {
    position: fixed;
    bottom: 45px;
    right: 120px;
    opacity: .7;
    z-index: 10;
}

#pronamaChan i {
    display: block;
    height: 200px;
    width: 130px;
    background: url("img/pronama-figure.png") no-repeat;
    background-size: cover;
}

#pronamaChan i:hover {
    background-image: url("img/pronama-figure-hover.png")
}

#mikumoChan {
    position: fixed;
    bottom: 45px;
    right: 30px;
    opacity: .8;
    z-index: 10;
}

#mikumoChan i {
    display: block;
    height: 190px;
    width: 130px;
    background: url("img/conoha-figure.png") no-repeat;
    background-size: cover;
}

#mikumoChan i:hover {
    background-image: url("img/conoha-figure-hover.png");
}

Characters.razor:

<a href="https://kei.pronama.jp" id="pronamaChan" target="_blank">
    <i></i>    
</a>

<a href="https://conoha.mikumo.com/" id="mikumoChan" target="_blank">
    <i></i>
</a>

and you can use it as:

<Characters />

Don't forget to set the name of the css file above as Characters.razor.css when you use it on Razor!