here's all my header stuff! not labeled but its pretty intuitive, but the first 4 is the nav buttons specifically (also i changed the font sizes to make the sizing look better for those specific icons, you can remove those) you can also specify these more if a header button overlaps with another, just ask me and i can help

/* ICON NEXT TO SIDEBAR USERNAME END */

 
.header .fa-home::before {
  content:'\f4c9';
}

.header .fa-comments::before {
   font-size: 15;
  content:'\e5c8';
}

.header .fa-search::before {
  font-size: 14;
  content:'\e65f';
}

.nav-link.dropdown-toggle .fa-search::before {
  font-size: 16.5px;
  content:'\e65f';
}

.header .fa-book::before {
  content:'\f499';
}

.navbar-right .fi-web::before, .fa-globe::before{
  font-family: 'Font Awesome 5 Pro';
  content:'\f57d';
  font-weight: 600
}

.header .fa-plus:before {
  content:"\f7ff";
  font-size:15px;
}

.header .fa-plus {
  transform: rotate(45deg);
}

.header .fa-clock::before {
  content:'\f34e';
}

.header .fa-newspaper::before {
  content:'\f0ca';
}

.header .fa-user::before {
  content:'\e1b0';
}

.header .fa-fire::before {
  content:'\e003';
}

.header .fa-binoculars::before {
  content:'\f21e';
}
.dropdown-item[href="https://toyhou.se/~images/multi-upload"] .fa-image:before{
   font-family: 'Font Awesome 5 Pro';
   font-weight: 600;
   content:'\f87c';
}

.navbar-right .fa-inbox::before {
    font-family: 'Font Awesome 5 Pro';
     font-size: 16;
       font-weight: 600;
  content:'\f227';
}

.navbar-right .fi-male::before {
    font-family: 'Font Awesome 5 Pro';
       font-weight: 600;
  content:'\f4bf';
}

.navbar-right .fi-heart::before {
    font-family: 'Font Awesome 5 Pro';
       font-weight: 600;
  content:'\f762';
}

.navbar-right .fi-star::before {
    font-family: 'Font Awesome 5 Pro';
       font-weight: 600;
  content:'\e065';
}

.navbar-right .fi-list::before {
    font-family: 'Font Awesome 5 Pro';
       font-weight: 600;
  content:'\f0ca';
}

.navbar-right .fi-comments::before {
    font-family: 'Font Awesome 5 Pro';
       font-weight: 600;
  content:'\e5c9';
}

.navbar-right .fi-mail::before {
  font-family: 'Font Awesome 5 Pro';
  content: "\f674";
  font-weight: 600;
}


.character-name-badge .fa-bookmark::before {
  content:'\e176';
}

.bulletin-header-content .fa-chart-pie::before {
  content:'\e474';
}

.btn.btn-warning[href="https://toyhou.se/~inbox/worlds"] >.fi-web::before, .dropdown-item[href="https://toyhou.se/~inbox/worlds"] > .dropdown-item-title > .fi-web::before {
  font-family:'Font Awesome 5 Pro';
  font-weight:600;
  content: '\e027';
}

i.fi-torso.user-name-icon:before {
font-family: 'Font Awesome 5 Pro';
font-weight: 600;
content: "\f192";
}

i.fi-star.user-name-icon:before {
font-family: 'Font Awesome 5 Pro';
font-weight: 600;
content: "\f2e5";
}