public Text SomeText;

public void Show(CompositeDisposable disposable, Model model)
{
    model.SomeField
        .Subscribe(x => SomeText.text = x)
        .AddTo(disposable);
}

class Player
{
    public ReactiveProperty<int> Health;
    public ReactiveProperty<int> MaxHealth;
    public ReactiveProperty<string> Name;
    public ReactiveProperty<bool> Invincible;
}

class PlayerView
{
    public Image HealthBar;
    public Text Name;
    public GameObject InvincibilityGlow;
}

static void ShowPlayerView(CompositeDisposable disposable, Player player, PlayerView playerView)
{
    Observable.CombineLatest(player.Health, player.MaxHealth, (health, maxHealth) => (float)Health / MaxHealth)
        .Subscribe(x => playerView.HealthBar.fillAmount = x)
        .AddTo(disposable);

    player.Name
        .Subscibe(x => playerVIew.Name.text = x)
        .AddTo(disposable);

    player.Invincible
        .Subscribe(x => playerView.InvincibilityGlow.SetActive(x))
        .AddTo(disposable);
}