If one person has an android, can she be part of the group text?

Send a group text message on your iPhone or iPad - Apple Support

• If you send a group message to people who aren't using iMessage, then the message is sent as an MMS or SMS message.

(This would be anyone running Android)

Group SMS

These messages also appear in green text bubbles and go through your carrier. Group SMS messages don’t support multimedia attachments, like photos or videos. All responses in a group SMS are sent as individual text messages and the recipients can’t see the other responses from the group.

Send a group text message

1. Open Messages and tap the Compose button .
2. Enter the names or tap the Add button  to add people from your contacts.
3. Type your message, then tap the Send button .

To send a group MMS message on an iPhone, make sure MMS Messaging is turned on. Go to Settings > Messages and turn on MMS Messaging. If you don’t see an option to turn on MMS Messaging or Group Messaging, contact your carrier to see if your plan supports Group MMS Messaging.