public enum PlayerState
{
    Idle = 0,
    Move,
    Attack,
    Skill
}

public class PlayerCharacter
{
    private PlayerState m_State;
    private Skill m_Skill;
    private UpperBody m_Upper;
    private BottomBody m_Bottom;

    private void Update()
    {
        if ( Input.GetKeyDown(KeyCode.Space) == true )
        {
            m_State = PlayerState.Skill;
            m_Skill = Skill.Skill_1;

        }
        if ( Input.GetKeyDown(KeyCode.A) == true )
        {
            m_State = PlayerState.Skill;
            m_Skill = Skill.Skill_2;
        }

        FSM();
    }

    private void FSM()
    {
        switch ( m_State )
        {
            case PlayerState.Idle:
                break;

            case PlayerState.Attack:
                break;
            case PlayerState.Move:
            case PlayerState.Skill:
                {
                    FSM_Skill();

                    m_Upper.UseSkill();
                    m_Bottom.Walk();
                }
                break;
            default:
                break;
        }
    }

    private void FSM_Skill()
    {
        switch ( m_Skill )
        {
            case Skill.No:
                break;
            case Skill.Skill_1:
                break;
            case Skill.Skill_2:
                break;
            case Skill.Skill_3:
                break;
            default:
                break;
        }
    }
}

public enum Skill
{
    No = 0,
    Skill_1,
    Skill_2,
    Skill_3
}



public class UpperBody
{
    private BottomBody m_Bottom;

    public void Control()
    {
        m_Bottom.Walk();
    }

    public void Rotate()
    {

    }

    public void UseSkill()
    {

    }
}

public class BottomBody
{
    private UpperBody m_Upper;

    public void Control()
    {
        m_Upper.Rotate();
    }

    public void Walk()
    {

    }
}