C#

//class Human:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;

namespace WindowsFormsApplication5
{
    class Human
    {
        public string Name = "none";
        public Point location = new Point();

        public void Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            e.Graphics.DrawString(Name, new Font("Arial", 9), new SolidBrush(Color.Black), location.X - 5, location.Y - 15);
            e.Graphics.FillRectangle(new SolidBrush(Color.Red), new Rectangle(location.X, location.Y, 20, 20));
        }

        public event EventHandler MouseEnter;

    }
}

//Form1:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            female.Name = "Alina";
            female.location = new Point(30, 30);
            female.MouseEnter += new EventHandler(female_MouseEnter);
        }

        Human female = new Human();
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            female.Paint(sender, e);
        }

        void female_MouseEnter(object sender, EventArgs e)
        {
            female.Name = "Olina";
        }
    }
}